Physical Therapy CPT Codes 2027: Complete PT Code List, Units, Modifiers, and Medicare Billing Rules

Physical therapy CPT codes, or PT CPT codes, are the AMA codes on every PT claim for evaluations, treatment, and modalities. The CPT code for physical therapy you'll bill most is 97110, then 97530, 97140, and 97112. Most bill in 15-minute units, and none of these core codes change in 2027.

The 2027 changes are narrower. Biofeedback becomes timed: 90901 covers the first 15 minutes, and the new add-on 90903 covers each extra 15. Medicare also proposes a $2,540 KX threshold, a lower conversion factor, and new limits on remote therapeutic monitoring.

Getting these physical therapy billing codes wrong isn't a minor inconvenience. A mismatched modifier triggers a CO-4 denial. A missing KX flag above the Medicare threshold means automatic rejection on every claim above that line. Billing 97014 on a Medicare claim instead of G0283 generates a denial that your billing team may not catch until it shows up in the aging report weeks later.

This guide gives your billing team the full PT code list with AMA descriptors, 2026 rates and the 2027 proposal, and modifier rules. You also get the 8-minute rule with worked examples and a denial breakdown by reason code. It covers pelvic floor, home health, and RTM codes too.

MedSole wrote this from the view of an RCM company that bills PT claims every week. For every 2027 change across specialties, see our guide to 2027 CPT code changes.

What Changes for Physical Therapy CPT Codes in 2027

PT treatment and evaluation codes stay the same in 2027. The AMA left the core PT treatment codes unchanged: 97110, 97112, 97116, 97140, 97530, and 97535. Evaluation codes 97161 to 97164, modality codes 97010 to 97039, 97750, and dry needling codes 20560 and 20561 stay the same too. Your charge master keeps those codes as they are.

Biofeedback is the PT code change. The AMA's CPT 2027 code set revises 90901 to report the first 15 minutes of training with direct patient contact. It adds 90903 for each additional 15 minutes. Pelvic floor biofeedback stays on 90912 and 90913, with the same descriptors.

The rest is Medicare payment, and it's still proposed. CMS proposed a conversion factor of $32.8409, down 1.68%. It also proposed a practice expense change that APTA estimates adds about 1% to 3% a year for common PT codes. The final rule is expected in early November.

Two more items reach PT claims. The proposed KX threshold rises to $2,540 from $2,480. If your practice also employs speech-language pathologists, 92507 is deleted. Timed codes 92654 through 92663 replace it, as our speech therapy CPT codes guide explains. Speech therapy counts toward the same PT and SLP KX total.

Physical Therapy CPT Codes Cheat Sheet: 2026 vs 2027

Keep this table next to your charge screen. It lists what you bill through December 31, 2026, and what changes for dates of service from January 1, 2027. Medicare figures for 2027 stay proposed until CMS publishes the final rule.

Physical Therapy CPT Codes Cheat Sheet: 2026 vs 2027

What Are Physical Therapy CPT Codes?

Physical therapy CPT codes are five-digit numeric codes from the AMA's Current Procedural Terminology system used to describe and bill for specific physical therapy services provided under Medicare Part B and commercial insurance plans. The AMA owns and maintains the CPT code set, updating it annually. The CPT 2027 code set, released September 9, 2026, includes 453 changes across all specialties: 299 new codes, 74 revisions, and 80 deletions. PT services use codes primarily in the 97000 to 97799 range, plus select HCPCS Level II codes like G0283.

CPT codes and ICD-10 codes are not the same thing, and mixing them up is a common front desk mistake. ICD-10 codes describe why the patient is being treated, meaning the diagnosis. CPT codes describe what the therapist actually did, meaning the procedure. Every claim needs both. When the diagnosis code doesn't support the procedure code billed, the payer issues a CO-11 denial. That's a fixable problem, but only if your team knows the difference.

PT procedure codes fall into two main categories: timed and untimed. Most treatment codes are timed in 15-minute increments, so the number of units billed depends on how many minutes of skilled service were provided. Evaluation codes work differently. They're untimed, billed once per evaluation regardless of how long it took. The 8-minute rule section below covers the full mechanics of timed versus untimed billing.

The AMA's CPT 2026 code set added three remote therapeutic monitoring codes to the therapy list effective January 1, 2026. CPT 2027 makes biofeedback timed and leaves the standard PT treatment code descriptors unchanged. CMS therapy services guidance covers how those codes apply under Medicare Part B.

How Physical Therapy CPT Codes Differ from ICD-10 and HCPCS Codes

Three separate code systems appear on every PT claim, and each one does a different job. CPT codes describe what service was performed. ICD-10 codes describe why the service was medically necessary. HCPCS Level II codes cover supplies and certain services that don't have a CPT code, including G0283, which Medicare requires instead of CPT 97014 for unattended electrical stimulation. Your billing system needs all three layers working correctly or the claim won't process cleanly.

Complete List of Physical Therapy CPT Codes by Category

PT procedure codes organize into six main categories. Knowing the category tells you immediately whether a code is timed or untimed, which changes how you calculate units and apply modifiers. The most common PT CPT codes fall into evaluation and reevaluation codes, therapeutic procedure codes, supervised modality codes, constant attendance modality codes, remote therapeutic monitoring codes, and biofeedback codes.

CPT Code 97110: Therapeutic Exercise

CPT code 97110 (therapeutic exercise) covers strength training, endurance work, range of motion, and flexibility training performed by a qualified clinician in direct one-on-one contact with the patient. It's a timed code billed in 15-minute units, and it's the most frequently billed code across all physical therapy CPT codes.

The skill requirement is specific. This isn't gym exercise with a therapist watching from across the room. CMS requires constant clinician attendance and direct connection between the exercise performed and a functional goal documented in the plan of care. That's what separates billable therapeutic exercise from general wellness activity, which Medicare doesn't cover. The CGS Medicare targeted review list includes CPT 97110 specifically because insufficient documentation of that clinical rationale is one of the most common findings.

On the 2026 Medicare fee schedule, the 97110 CPT code reimbursement averages approximately $34 to $36 per unit at the national rate, with actual payment varying by geographic locality. Due to APTA advocacy, timed codes including the therapeutic exercise CPT code were exempted from the 2026 efficiency adjustment, which preserved reimbursement levels relative to non-timed codes.

Two billing errors show up repeatedly on 97110 claims. First, billing the ther ex CPT code when 97530 is actually the right choice because the activity is functional rather than isolated. Second, documenting time in rounded or vague terms that don't support the number of units billed. Both patterns draw denials and, in high-volume practices, post-payment audit attention.

CPT Code 97530: Therapeutic Activities

The official AMA descriptor for 97530 CPT code covers therapeutic activities requiring dynamic activities to improve functional performance. In plain terms, that means real-world movements, not isolated muscle work. Sit-to-stand transfers, lifting training, overhead reaching tasks, and functional mobility drills all fall under this therapeutic activity CPT code. Like 97110, it's timed in 15-minute units and requires direct one-on-one contact with a skilled clinician.

Here's the distinction that matters for both accuracy and revenue: CPT 97110 targets isolated physical parameters such as strength, endurance, and range of motion. CPT 97530 targets functional performance as applied to real-life tasks and activities of daily living. Quad sets on a table are 97110. Teaching a patient to safely stand from a low chair so they can get off the toilet at home is 97530. The key distinction is whether the goal is a physical parameter or a functional outcome. Getting this wrong costs money in both directions: undercoding 97530 as 97110 leaves reimbursement on the table, since 97530 typically reimburses slightly higher under most fee schedules.

Is CPT code 97530 occupational therapy or physical therapy? Both disciplines can bill it. The discipline is identified by the modifier appended to the claim: GP for physical therapy, GO for occupational therapy. Missing or swapping those modifiers is a common payer rejection that's entirely preventable with a correctly configured billing system.

On the 2026 Medicare fee schedule, the 97530 CPT code reimbursement averages approximately $35 to $38 per unit nationally. If a session includes both isolated exercise and functional activity, billing both 97110 and CPT 97530 on the same claim is appropriate when each service is documented separately and the total timed minutes support both units. Per CMS billing guidance for therapeutic procedures, the combination is allowed with proper documentation.

The most common billing mistake with 97530 isn't a technical error. It's habit. Practices that bill 97530 interchangeably with 97110 based on which code the therapist prefers, rather than what the documentation actually supports, create a ratio pattern that post-payment reviewers flag. Payers compare your 97530 to 97110 ratio against regional norms. An outlier ratio without corresponding documentation is an audit waiting to happen.

If your practice is seeing denials on either of these codes, the fix is usually in the documentation workflow, not the code selection itself. Our outsourced medical billing services team reviews timed code claim patterns as part of every PT billing audit, including 97110 and 97530 documentation alignment.

CPT Code 97140: Manual Therapy Techniques

CPT code 97140 (manual therapy) covers skilled hands-on techniques including joint mobilization, manipulation, manual lymphatic drainage, myofascial release, and soft tissue mobilization. It's a timed code billed in 15-minute units with direct one-on-one contact required throughout. For 2026, this manual therapy CPT code carries particular significance: due to APTA advocacy during the CY 2026 Physician Fee Schedule rulemaking, 97140 shifted from a negative year-over-year reimbursement change to a positive one. That's a meaningful reversal practices should factor into their revenue projections.

Documentation is where most 97140 denials originate. Payers reviewing manual therapy claims want four specific things in the note: the technique used, the body region treated, the clinical rationale connecting that technique to a functional goal in the plan of care, and the patient's response. "Manual therapy to lumbar spine, 15 minutes" doesn't cut it. That note will support a denial every time a payer looks closely at it.

CMS removed the NCCI edit between 97140 and 97530 from its procedure-to-procedure tables effective January 1, 2021. You can bill both on the same date without Modifier 59 when each has its own minutes, technique, and goal in the note. Some commercial payers still run their own edit, so check payer policy.

Under the CMS CY 2026 Physician Fee Schedule, the 97140 CPT code reimbursement averages approximately $34 to $37 per unit nationally, with geographic locality adjustments applying to the final allowed amount. The exemption from the 2026 efficiency adjustment keeps this rate more favorable than it was projected to be before APTA's intervention. See the APTA 2026 fee schedule analysis for the overall payment impact.

If you bill 97140 regularly and see denials come back on manual therapy, the documentation gap is usually the source. It's a fixable workflow problem, not a clinical one. Our outsourced medical billing services team reviews 97140 claim patterns as part of every PT billing audit.

CPT Code 97112: Neuromuscular Reeducation

CPT code 97112 (neuromuscular reeducation) covers treatment designed to improve balance, coordination, kinesthetic sense, posture, and proprioception. Timed in 15-minute units, it requires direct one-on-one contact throughout the session. Common clinical applications include post-stroke rehabilitation, post-surgical balance retraining, and care for patients with neurological conditions affecting motor control and functional movement patterns. Practices frequently bill the 97112 CPT code alongside 97110 on the same claim, which is appropriate when both services are documented as distinct.

Objective measures are non-negotiable for this code. Payers reviewing neuromuscular reeducation CPT code claims want to see specific data: balance test scores, coordination assessment findings, or proprioception measurement results recorded at baseline and tracked through progress notes. Subjective descriptions like "patient demonstrates impaired balance" don't justify repeated billing of CPT code 97112. Without objective baseline data, there's no way to demonstrate that a skilled service was provided or that the patient is progressing.

The distinction between 97112 and 97110 matters for billing accuracy, not just clinical accuracy. Both codes are timed, both require one-on-one contact. The difference is the clinical target: 97110 addresses physical capacity like strength and range of motion, while the neuromuscular reeducation CPT code targets the quality of movement, postural control, and the nervous system's ability to coordinate muscle activity. Billing both on the same claim is correct when the documentation reflects genuinely separate interventions for separate clinical goals.

CGS Medicare has included CPT 97112 claims in its Targeted Probe and Educate review, alongside 97110, 97140, and 97530. Heavy utilization of this code without corresponding objective documentation is a pattern that draws contractor attention. Review your documentation standards before your next remittance, not after a records request arrives. See the CGS Medicare medical review activity log for current review criteria.

CPT Code 97116 and Other Timed Procedure Codes

Beyond the four highest-volume codes, several timed procedure codes appear regularly in PT billing. Here's what your billing team needs to know about each.

The gait training CPT code (97116) and 97535 generate the most billing questions among PT treatment codes. On 97535 specifically: some billing teams assume it's an OT-only code. It isn't. Physical therapists can bill 97535 when teaching patients how to safely perform home activities following injury or surgery, such as stair navigation, fall prevention techniques, or adaptive equipment use. The discipline modifier is what designates who provided the service: GP for physical therapy, GO for occupational therapy. CPT 97116 follows the same modifier logic.

Group therapy billing has a common overbilling pattern. CPT 97150 is untimed. Bill it once per patient for each group session, not by the hour. Some payers also require a minimum patient count or a specific group therapy note format before they'll process the claim. Verify your payer's group therapy policy before billing 97150, and confirm it in writing if you can. Per CMS therapy coding and billing guidance, group therapy cannot be billed on the same date as individual timed codes for the same service.

Physical Therapy Evaluation CPT Codes: 97161, 97162, 97163, and 97164

These four evaluation codes replaced 97001 and 97002 in 2017. APTA advocated for the change because a single flat-rate evaluation code failed to account for the difference in clinical work between a straightforward ankle sprain evaluation and a complex multi-system neurological case. That change is permanent, and every major payer has adopted it. If your practice management system still shows 97001 or 97002 as active codes, update it before your next claim submission.

Each tier has its own guide: CPT 97161 for low complexity and CPT 97162 for moderate complexity, with documentation examples for each.

Complexity is determined by clinical findings, not by the clock. Selecting 97163 because the evaluation ran 45 minutes when the clinical picture is straightforward is incorrect coding. Payers audit evaluation code distribution patterns specifically because upcoding on the complexity tier is one of the most common PT billing errors. The time spent during the evaluation can inform the complexity level, but it doesn't determine it.

Here's the process that protects you: document first, code second. The PT evaluation CPT code selection happens after the evaluation is complete, based on what was actually found during the exam. Practices that select the code before the evaluation and then write notes to match it are creating a compliance risk that's difficult to defend if a payer audits. That's true even when the underlying care was appropriate. Per APTA guidance on evaluation code complexity, the complexity criteria in the table above reflect what CMS and commercial payers expect to see in the record.

Physical therapy evaluation codes (97161 to 97163) can be billed on the same date of service as treatment codes such as 97110 or 97140, provided that separate documentation supports each service as distinct and medically necessary. Medicare removed the NCCI edit between the evaluation codes and 97140 in 2021, but some commercial payers still ask for Modifier 59. Check your payer-specific rules, but don't assume same-day billing is prohibited. It's allowed when the documentation supports it.

The 97164 reevaluation code works differently from the three initial evaluation tiers. It's untimed, billed once per reevaluation regardless of how long it takes, and it requires documented evidence of a change in the patient's clinical status or condition since the last evaluation. Billing 97164 at routine intervals without that documented clinical change is a denial trigger. Many payers also require a minimum number of treatment visits between reevaluations before the physical therapy reevaluation CPT code will be accepted on a claim.

Evaluation code selection is one of the most audited areas in PT billing. A pattern of consistently selecting the wrong complexity level, even without intent, creates payer attention that's hard to reverse once it starts. If you're unsure whether your evaluation coding reflects actual clinical complexity, our denials management team can review it.

Physical Therapy Modality CPT Codes: Supervised and Constant Attendance

Modality codes split into two categories, and the distinction controls both how you bill and how MPPR affects your payment. Supervised modalities require therapist supervision but not constant attendance. They're untimed, billed once per session regardless of how long the patient uses the device. Constant attendance modalities require active therapist involvement throughout the treatment and are billed in 15-minute timed units. Mixing up these categories in physical therapy CPT code billing affects unit calculations and can trigger MPPR errors on multi-code sessions.

Supervised Modality Codes (Untimed)

Constant Attendance Modality Codes (Timed)

The 97014 versus G0283 issue is one of the most common Medicare-specific billing traps in PT. For Medicare Part B outpatient physical therapy claims, unattended electrical stimulation must be billed using HCPCS code G0283, not CPT code 97014. Using 97014 on a Medicare claim results in a denial. Commercial payers typically accept the 97014 CPT code without issue. If your billing system doesn't automatically swap 97014 to G0283 based on payer, that's a configuration problem generating denials you may not be catching until they age past the appeal deadline.

CPT 97014 vs G0283: Which Code Medicare Accepts

G0283 is the HCPCS code for unattended electrical stimulation outside wound care, furnished as part of a therapy plan of care. A CMS transmittal told contractors that Medicare doesn't recognize 97014 and to use G0283 instead. That rule carries into 2027.

CPT 97014 vs G0283 by payer

CPT 97035 and 97018: Ultrasound and Paraffin Bath

CPT 97035 is therapeutic ultrasound, a timed constant attendance code billed per 15 minutes. CPT 97018 is paraffin bath, a supervised code billed once per session. When you bill both on one date, document the body area and minutes for the ultrasound so it stands apart from the paraffin bath.

CPT code 97035 (ultrasound therapy) is one of the more documentation-intensive modality codes. Payers want to see the intensity setting, the frequency used, and the specific area treated on every claim. Generic notes on ultrasound claims are a reliable path to a medical necessity denial on audit. The ultrasound therapy CPT code also carries MPPR implications when billed alongside timed therapeutic procedure codes in the same session, which the MPPR section below covers in detail.

For questions about how your practice manages revenue cycle management across modality and procedure codes, our team works through these billing structures daily on PT accounts.

Timed vs. Untimed Physical Therapy CPT Codes: The 8-Minute Rule Explained

Most PT treatment codes are billed in 15-minute timed units. To bill one unit of a timed code, the therapist must provide at least eight minutes of that specific skilled service. That's where the rule gets its name. It applies to Medicare and most commercial payers across all timed physical therapy CPT codes. Untimed codes work differently: bill them once per session regardless of how long the service takes.

Here's the distinction that trips up billing teams: CMS and AMA don't calculate units the same way for multi-code sessions. Per CMS 8-minute rule guidance, when a patient receives multiple timed services in one session, you add all timed minutes together and then assign the total billing units for physical therapy from that combined number. The AMA's midpoint principle applies per individual code. For Medicare claims, use the CMS total-minutes method.

Walk through a real example. A patient receives 25 minutes of 97110 (therapeutic exercise) and 20 minutes of 97140 (manual therapy). Total timed minutes: 45. Under the CMS method, that supports three units for physical therapy billing. The billing team then allocates those three units across the two codes based on actual time spent, so two units to 97110 and one unit to 97140 in this case.

The most common unit calculation mistake has nothing to do with the math. Billing teams count total time with the patient rather than time spent on skilled intervention. If a therapist spends 30 minutes with a patient but only 18 of those minutes involve active skilled service, and the remaining time goes to equipment setup or rest breaks, only 18 minutes count toward timed units for physical therapy. Auditors look for exactly this gap between documented time and billed units.

One more layer matters every year: PTA billing interaction with the 8-minute rule. When a Physical Therapist Assistant furnishes timed services in whole or in part, the CQ modifier is required and Medicare applies the 85% payment rate to those units. Per CMS therapy billing rules, CMS has issued guidance on how the midpoint concept applies to the final unit when a session is split between a PT and a PTA. If your practice uses PTAs and you're not tracking service-level staff assignments, you're missing CQ on claims that need it.

Unit calculation errors show up on both sides: underbilling loses revenue you earned, and overbilling creates audit exposure. Our AR follow-up team catches these patterns on PT accounts every week.

Biofeedback Units in 2027: 90901 Plus 90903

From January 1, 2027, biofeedback follows the same 15-minute logic. Bill 90901 once for the first 15 minutes of direct patient contact, then 90903 for each additional 15 minutes. A 45-minute session bills as 90901 plus two units of 90903, not three units of 90901.

Pelvic floor biofeedback already works this way. 90912 covers the first 15 minutes of one-on-one contact, and 90913 covers each additional 15. Update your charge rules for 90901 before January so your system can't post repeat units of the base code.

Physical Therapy CPT Code Modifiers: What Each One Means and When to Use It

A modifier is a two-character code appended to a CPT code that gives the payer additional information about the service provided. In physical therapy CPT codes and modifiers, there are three distinct jobs a modifier can do: identify the treating discipline, confirm medical necessity above a financial threshold, or signal that two services on the same claim are genuinely separate. Missing or wrong modifiers are among the top denial causes in PT billing, and most of them are preventable with a correctly configured billing system.

The GP modifier for physical therapy is the most frequently missed modifier by new billing staff, and the consequences scale fast. Every PT claim going to Medicare or most commercial payers requires GP appended to each timed code line. It tells the payer the service falls under a physical therapy plan of care, not occupational therapy, not speech therapy. One missing modifier GP for PT across a batch of claims creates a denial wave that takes days to work through. Per CMS modifier requirements for therapy claims, this is a required field, not optional documentation.

The KX modifier physical therapy requirement kicks in on cumulative patient spending, not per-visit charges. Once a patient's allowed PT and SLP charges pass $2,480 in 2026, every line above it needs KX or Medicare denies it. CMS proposed $2,540 for 2027, and the total resets each January 1.

Modifier 59 is not a blanket fix for bundling issues. When NCCI edits flag two CPT codes as potentially unbundled, Modifier 59 can override the edit when the services were genuinely distinct: different body regions, different time periods, or different clinical approaches. Using 59 as a routine workaround without documentation behind it is a compliance risk. Payers audit Modifier 59 usage specifically because it's a known vulnerability.

The CQ modifier carries a direct payment consequence. When a PTA furnishes PT services in whole or in part, CQ is required and Medicare pays 85% of the otherwise applicable rate for 97530 and all other timed codes provided by the PTA. The rule is unchanged in 2026 and 2027. Practices that don't track which staff member performed each service unit will miss CQ, overpay themselves temporarily, and face repayment requests after a post-payment review.

Medicare Physical Therapy Billing Guidelines: KX Threshold for 2026 and 2027

Medicare physical therapy billing runs on two financial thresholds that reset every January 1. Most billing teams know these thresholds exist in theory. The problem is tracking them per patient in real time, before a claim hits the threshold without the required modifier. By the time the denial arrives, you've already missed the window for clean submission.

The 2026 KX threshold for PT and SLP services combined is $2,480, with a separate $2,480 for OT, per CMS therapy services guidance. For 2027, CMS proposed $2,540 for each. Once a patient's allowed PT and SLP charges pass the year's amount, every later line needs KX or Medicare denies it.

KX is not just a billing checkbox. Appending KX to a claim is a clinical attestation from the treating therapist: the services above the threshold are medically necessary and the documentation in the patient's record supports that conclusion. If a payer audits and the record doesn't support the attestation, the exposure goes beyond the denied claim. Physical therapy documentation requirements for billing KX claims are the same as any Medicare skilled service, but the stakes are higher because the attestation is explicit.

The targeted medical review threshold is $3,000 for PT and SLP combined, with a separate $3,000 for OT, per CMS therapy services guidance. It stays at $3,000 in 2027 and rises with the Medicare Economic Index from 2028. Treat any patient above $3,000 as if a records request is on its way.

2027 Medicare Billing Checklist for PT Claims

Before you submit any PT claim above the year's KX amount ($2,480 in 2026, $2,540 proposed for 2027):

1. Confirm the patient's year-to-date allowed amount for PT and SLP services combined
2. Apply KX modifier to each claim line
3. Verify the patient record documents continued medical necessity
4. Confirm the plan of care is current and certified by the physician
5. Ensure objective functional measures are documented with baseline and progress data
6. For patients above $3,000: treat the documentation as if it will be reviewed

Every PT claim must also meet the documentation standard from Medicare reasonable and necessary therapy standards in CMS's Medicare Benefit Policy Manual Ch. 15. Therapy must be reasonable and necessary, must require the skill of a licensed therapist, and must target functional improvement. Services that are maintenance-level or could be performed safely by an untrained caregiver don't meet the skilled service standard and aren't covered under Medicare Part B. That distinction is exactly what Medicare auditors look for when they review records above the KX threshold.

Tracking KX thresholds per patient across a full caseload is the kind of task that gets missed in busy practices. One missed KX modifier means one denial. Across a month of high-utilization Medicare patients, that adds up fast. Our team tracks this automatically for every patient we bill through our revenue cycle management process.

Physical Therapy CPT Code Reimbursement Rates: 2026 Fee Schedule and 2027 Proposal

Medicare reimbursement rates for physical therapy billing codes vary by geographic locality. The national average figures below reflect the non-facility rate under the CY 2026 Medicare Physician Fee Schedule using a conversion factor of $33.40 for non-APM participants. APM participants receive $33.57. Use these as benchmarks for revenue modeling, not as exact projections for your specific location.

For exact locality-adjusted rates, use the CMS Medicare Physician Fee Schedule lookup tool and filter by your specific geographic area and facility type.

The 2026 conversion factor context matters for outpatient PT practices specifically. CMS finalized a 3.26% increase to the conversion factor for CY 2026. Per the APTA 2026 reimbursement analysis, the average net reimbursement impact for PT works out to approximately a 1.75% increase. The 2.5% efficiency adjustment that reduced payment on certain codes did not apply to timed PT procedure codes, which was the result of sustained APTA advocacy during the CMS CY 2026 Physician Fee Schedule final rule comment period.

Physical Therapy Reimbursement Rates for 2027: What CMS Proposed

CMS proposed a 2027 conversion factor of $32.8409 for clinicians outside a qualifying APM, down 1.68%, and $33.1693 for qualifying APM participants. On its own, that would trim every PT code. A change to practice expense math pushes the other way.

CMS proposes to remove the Indirect Practice Cost Index from practice expense calculations, phased in over 2027 and 2028. APTA models a 35% to 45% rise over eight years in practice expense RVUs for the most-billed PT codes. That works out to about 1% to 3% a year.

CMS hasn't published final 2027 rates, so this guide doesn't list per-code figures yet. Once the final rule comes out, expected in November, check your locality in the CMS fee schedule lookup. Until then, model January revenue with the proposed conversion factor.

MPPR affects multi-code session revenue. When a patient receives two or more "always therapy" services in a single session, Medicare pays 100% for the service with the highest practice expense component and 50% of the practice expense for each subsequent service billed that day. That's not a denial and it's not an error. It's a built-in payment structure that's been in place since April 2013 and did not change in 2026.

Multiple Procedure Payment Reduction: What It Means for Your PT Revenue

MPPR applies whenever a PT patient receives more than one "always therapy" service in a single session. Medicare reduces the practice expense portion of payment for the second and subsequent services by 50%, per CMS MPPR policy for therapy services. This has applied since April 2013 and is unchanged in 2026. Billing for physical therapy services with multiple timed codes on the same claim doesn't trigger a denial; it triggers a payment reduction that's already factored into the fee schedule structure.

Here's the practical breakdown. If a session includes 97110 and 97140, Medicare pays 100% of the practice expense component for whichever code carries the higher PE value, and 50% of the PE for the other. The work RVU and malpractice RVU portions are not touched by MPPR. Total payment on the session is reduced, but both codes are paid.

Don't appeal MPPR reductions. They're not processing errors, and payers won't reverse them. What you can do is factor MPPR into physical therapy medical billing revenue projections and work with your clinical team on session structuring. Scheduling the highest-PE service first doesn't change the math, but understanding which code combinations trigger the steepest PE reduction helps practices model expected revenue accurately before sessions are scheduled.

Remote Therapeutic Monitoring Codes for PT: 2026 Codes and 2027 Proposals

Effective January 1, 2026, CMS added three new RTM codes to the therapy code list as "sometimes therapy" services, per the CMS MM14250 therapy code list 2026 update. For PT practices running musculoskeletal RTM programs, the new physical therapy CPT codes 2026 structure addresses a real operational problem: previously, practices couldn't bill for patients who engaged with RTM devices for only part of a month. That all-or-nothing limitation made RTM difficult to sustain for shorter treatment episodes.

The two new device supply codes fill the partial-month gap directly. CMS added 98984 for respiratory RTM device supply covering two to 15 days in a 30-day period, and 98985 for musculoskeletal RTM device supply covering the same two to 15 day range. These complement the revised 98976 and 98977 descriptors, which now explicitly cover 16 to 30 days. A patient who engages with an RTM device for 10 days in a month can now generate a billable unit where none was possible before.

CPT 98979 is the third new code and it works differently. It covers the first 10 minutes of RTM treatment management services in a calendar month and requires at least one real-time interactive communication with the patient or caregiver during that month. For patients who need less intensive monitoring than 98980 covers, 98979 creates a lower-threshold billing option that didn't exist before 2026. This fills a genuine gap for patients in maintenance or early discharge phases who still benefit from periodic therapist contact.

Modifier requirements for the new PT CPT codes 2026 RTM services follow standard therapy rules. All RTM services rendered by a therapist are provided under a therapy plan of care, so GP is required for PT. Per CMS remote therapeutic monitoring guidance, only codes 98975, 98979, 98980, and 98981 are subject to the de minimis 10% policy that determines when the CQ modifier applies for PTA involvement. Device supply codes 98976, 98977, 98984, and 98985 are not subject to the de minimis policy.

One documentation issue to flag before a practice launches RTM billing under the new physical therapy CPT codes 2026: the interactive communication required for 98979 must be documented at the time it occurs. Post-dated RTM notes are a consistent audit trigger. If your documentation workflow doesn't capture real-time communications as they happen, fix that before billing 98979, not after a records request arrives.

What CMS Proposed for RTM in 2027

CMS proposed three RTM limits for 2027 in its July 2026 rule. RTM would be limited to established patients. A separate, billable initiating visit, in person or by telehealth, would come before RTM starts. And Medicare would pay only when clinical staff employed by your practice do the work.

CMS also proposed removing practice expense inputs from treatment management codes 98980 and 98981 while keeping their work values. It asked for comment on replacing the RPM and RTM codes with four HCPCS G-codes, two of them for RTM. None of this is final until the final rule, expected in November.

If your RTM program runs through a contracted monitoring vendor, the employed-staff proposal puts that revenue at risk. Before January, list which patients started RTM without a separate visit and which monitoring staff aren't on your payroll.

Common Physical Therapy Billing Errors and How to Prevent Claim Denials

Most PT billing denials aren't random. They follow predictable patterns tied to specific coding mistakes, documentation gaps, or workflow failures that repeat across dozens of claims before anyone catches them. Knowing the denial type tells you where the process broke down. Fixing the process stops the pattern. Appeals are necessary sometimes, but prevention is what actually protects revenue and saves staff time.

Here are the five physical therapy claim denials that show up most consistently across PT practices, with the reason codes your ERA will display and the root cause behind each one.

The CO-50 denial is the most financially damaging physical therapy billing error on this list. It's the payer's way of saying the documentation in the record doesn't justify the code that was billed. Here's what most practices get wrong about it: the service was almost always medically necessary. The therapist did the work. The problem is the notes didn't document it in a way the payer's reviewers accept. That's a fixable documentation workflow issue, not a clinical failure.

CO-4 denials in PT billing trace back to one source more than any other: a missing or incorrect GP modifier on timed code lines. Every PT claim submitted to Medicare and most commercial payers requires GP on each service line. A batch processed without GP generates a CO-4 wave that takes hours to work through. Setting up payer-specific modifier rules in your billing system is a one-time fix that eliminates this denial type across every future claim for that payer.

The NCCI edit denial scenario works differently. When two codes that payers treat as normally bundled appear on the same claim, the payer pays only one and denies the other. Modifier 59 can override the edit when the services were genuinely distinct, with documentation behind that distinction. Using Modifier 59 as a blanket workaround without clinical support in the record draws more audits than it resolves. Per CMS NCCI editing policy for therapy services, the documentation must independently justify the separate billing before the modifier is applied.

Four documentation elements prevent the majority of preventable physical therapy claim denials: a current and certified plan of care, objective functional measures with baseline and progress data, skilled intervention rationale tied to a specific functional goal, and correct therapist credentials on the claim. Per CMS documentation requirements for PT services, these are the elements reviewers check first on post-payment review. Get all four right on every claim and most denial types on this list stop appearing.

Denial patterns in PT billing repeat, which means one physical therapy coding and billing mistake gets copied across hundreds of claims before anyone catches it. By the time it surfaces in your AR aging report, you've lost weeks of revenue. Our denial management process finds those patterns in the first billing cycle review.

NCCI Edit Pairs: Which Physical Therapy CPT Codes Cannot Be Billed Together

CMS created the CMS National Correct Coding Initiative for therapy services to prevent inappropriate billing of code combinations where one code is considered a component of another. In PT billing, NCCI edits physical therapy claims automatically at the payer level. The claim doesn't come back with an explanation; one code simply pays and the other doesn't. Knowing which pairs are affected is the difference between systematic denials and clean claims.

Medicare NCCI status for common PT code pairs

Modifier 59 resolves NCCI bundling issues on PT claims when the services are genuinely distinct, but the word "genuinely" carries real weight. Distinct means different body regions, clearly separate treatment approaches, or separate time periods within the session that are each independently documented. Physical therapy coding compliance requires that the documentation explicitly states the distinction before Modifier 59 is applied, not after. Payers audit Modifier 59 overrides specifically because they're a known vulnerability, and a pattern of using the modifier without corresponding documentation is what draws a targeted review, not the modifier itself.

NCCI tables change every quarter, so check the current procedure-to-procedure file before you rely on any pair above.

Denials to Expect on PT Claims in January 2027

Expect January 2027 PT denials to come from units more than deleted codes. A biofeedback session billed as repeat units of 90901 is miscoded once 90903 exists, and payers can deny or recoup the extra units. Post the first 15 minutes on 90901 and every later 15 on 90903.

Practices with speech-language pathologists will see trouble on any 92507 line dated January 1, 2027, or later. Expect CO-181, procedure code invalid on the date of service, or a rejected claim. If CMS finalizes the RTM limits, RTM started without an initiating visit becomes the next denial risk.

Physical Therapy Telehealth Billing: Extended Through December 31, 2027

Under CAA 2026 section 6209, CMS extended the ability of physical therapists, occupational therapists, and speech-language pathologists to furnish Medicare telehealth services through December 31, 2027. The extension includes telephone assessment and management CPT codes for telehealth physical therapy: 98966, 98967, and 98968. That authorization is temporary. Per APTA telehealth advocacy for physical therapists, APTA is actively pushing for permanent status, but as of October 2026, practices should not plan billing programs around an assumption of permanence.

Place of service codes matter as much as the CPT code on a telehealth claim. Per CMS telehealth guidance for therapy providers, telehealth PT services require POS 02 when the service is provided from a location other than the patient's home, or POS 10 when the patient receives the service at home. The GP modifier still applies to every PT service line. Missing the correct POS code is among the most common causes of telehealth claim rejections, and it's not a payer error. It's a data entry issue that a claim scrubber should catch before submission. See the HHS telehealth billing reference for PT for the full POS code guidance.

Physical therapy CPT codes 2026 include 98966 through 98968 as audio-only telephone assessment and management codes. These are not video visits. The documentation requirement for audio-only differs from video telehealth in three specific ways: the note must reflect that the interaction occurred by telephone, the record must show the patient's consent to audio-only, and the clinician must document the clinical rationale for not conducting the visit by video. Missing any one of those three elements on an audio-only claim creates a medical necessity denial on post-payment review.

Commercial payer variability is real and worth flagging directly. Medicare's telehealth extension does not bind commercial payers to the same coverage rules. State telehealth mandates vary widely. Some commercial payers have already reverted to pre-pandemic telehealth restrictions for PT services. Verify each commercial payer's current telehealth policy before billing non-Medicare telehealth claims, and document that verification in your payer policy files.

Physical Therapy CPT Codes by Setting: Home Health, Inpatient, Outpatient, and Telehealth

The same CPT code carries different billing rules depending on where the service is delivered. Place of service determines which payer guidelines apply, whether Medicare Part A or Part B is the correct payer, and which modifiers are required. Getting the setting wrong on a claim isn't a minor error. It routes the claim to the wrong payment system and generates a denial that could have been prevented before submission.

The home health PT CPT code trap catches practices that haven't reviewed their billing setup in a while. CPT code S9131 appears in some home health agency billing systems for outpatient PT services provided in the home. S9131 is not a Medicare code. It will not process on a Medicare claim. For Medicare patients receiving home health PT under an active home health benefit, therapy services are bundled into the home health episode payment under the prospective payment system. Billing those services separately on a Part B claim while a Part A home health benefit is active is a compliance issue, not just a denial. If your practice provides home health PT services and bills Medicare, confirm with your compliance team that your episode tracking and Part A versus Part B determination process is current.

Home Health PT Codes: G0151 and S9131

G0151 is the HCPCS code for services of a qualified physical therapist in the home health or hospice setting, each 15 minutes. Home health agencies and hospices report it on institutional claims. It isn't priced on the physician fee schedule, so outpatient practices billing Part B don't use it.

S9131 is physical therapy in the home, billed per diem. It's an S code, a temporary national code that some commercial and Medicaid plans use. Medicare doesn't pay S codes. Bill S9131 only when the payer's contract or fee schedule lists it.

Our provider enrollment and credentialing services team works through setting-specific billing structures regularly, including practices that operate across multiple care settings.

Pelvic Floor Therapy CPT Codes: 90912, 90913, and Treatment Codes

The CPT code for pelvic floor therapy depends on what the therapist did. Pelvic floor biofeedback has its own codes: 90912 for the first 15 minutes of one-on-one contact, and 90913 for each additional 15. Exercise, neuromuscular work, and manual techniques bill on 97110, 97112, 97140, and 97530.

Pelvic floor physical therapy CPT codes

Medicare's national coverage policy covers biofeedback for stress or urge urinary incontinence. The patient must have intact cognition and a documented four-week trial of pelvic muscle exercise that failed. Medicare doesn't cover home biofeedback. For fecal incontinence, check your contractor's local policy.

Biofeedback CPT Codes for 2027: 90901 and 90903

Biofeedback that isn't pelvic floor bills on 90901. From January 1, 2027, 90901 reports the first 15 minutes of training by any modality with direct patient contact. 90903 reports each additional 15 minutes. CMS proposed the work values the AMA's HCPAC recommended for both codes, per AOTA.

Before 2027, 90901 was untimed and billed once per session. Change your charge rules and session templates before January. Record start and stop times for every biofeedback session so the units hold up on review.

Specialty Physical Therapy CPT Codes: Dry Needling, Aquatic Therapy, and Work Conditioning

Some PT specialties require more billing awareness than the standard code set suggests. Specialty services typically use existing physical therapy CPT codes with documentation that specifies the clinical application, or they fall into unlisted code territory where payer-specific coverage policies determine whether a claim pays at all.

Dry needling billing is a different situation. Coverage isn't just variable; some commercial payers explicitly exclude dry needling by policy regardless of what code is used. Verify coverage in writing before billing any dry needling service, and keep that verification on file. A verbal authorization from a payer representative doesn't protect a claim in post-payment review.

For questions about how specialty PT billing fits into your broader revenue cycle management, our team handles these code-level details across PT practices regularly.

Physical Therapy CPT Codes: Frequently Asked Questions

Q1: What are the most common physical therapy CPT codes?

The most common physical therapy CPT codes are 97110 (therapeutic exercise), 97530 (therapeutic activities), 97140 (manual therapy), 97112 (neuromuscular reeducation), 97116 (gait training), and the evaluation family of 97161, 97162, and 97163. Selecting the right code depends on what the therapist actually did and what the documentation in the patient's record supports. Code selection based on habit rather than documented clinical intent is one of the most common audit triggers in PT billing.

Q2: What is CPT code 97110 used for?

CPT code 97110 (therapeutic exercise) covers strength training, endurance work, range of motion, and flexibility exercises performed by a qualified clinician in direct one-on-one contact with the patient. The exercise must target a functional goal documented in the plan of care. General wellness activity doesn't qualify. CPT 97110 is a timed code billed in 15-minute units, and the 8-minute rule applies to every unit billed. To bill one unit, the therapist must provide at least eight minutes of skilled therapeutic exercise.

Q3: What is the difference between CPT codes 97110 and 97530?

CPT 97110 targets isolated physical parameters such as strength, endurance, and range of motion. CPT 97530 targets functional performance as applied to real-life tasks and activities of daily living. Isolated quad strengthening on a table is 97110. Teaching a patient to safely rise from a low chair for kitchen safety is 97530. Both can appear on the same claim when documented as distinct services with separate clinical rationale. CPT 97530 typically reimburses slightly higher than 97110 under most fee schedules, so selecting the correct code matters for both accuracy and revenue.

Q4: What is the 8-minute rule in physical therapy billing?

The 8-minute rule means that to bill one unit of a timed PT CPT code, the therapist must provide at least eight minutes of that skilled service. Under the CMS method, when a session includes multiple timed codes, you add all timed minutes together and assign total units from that combined number using the unit table in the 8-minute rule section. The AMA uses a midpoint principle per individual code, but for Medicare claims, always use the CMS total-minutes method. When a PTA provides timed services in whole or in part, the CQ modifier is required and Medicare applies the 85% payment rate to those units.

Q5: What CPT codes are used for physical therapy evaluations?

Physical therapy evaluation CPT codes are 97161 (low complexity), 97162 (moderate complexity), 97163 (high complexity), and 97164 (reevaluation). These four codes replaced 97001 and 97002 in 2017. Complexity is determined by clinical findings after the evaluation is complete, not by the time spent during the visit. CPT 97164 is untimed and requires documented change in the patient's clinical status since the last evaluation. The evaluation table above compares history, examination, and decision-making for each level.

Q6: What is the KX modifier threshold for physical therapy in 2026 and 2027?

The KX modifier tells Medicare that therapy above the yearly threshold is medically necessary. In 2026, the threshold is $2,480 for PT and SLP combined, with a separate $2,480 for OT. CMS proposed $2,540 for 2027. Without KX, Medicare denies every line above the threshold. Targeted medical review starts at $3,000 and stays there through 2027.

Q7: Can physical therapy evaluation and treatment be billed on the same day?

Yes. Physical therapy evaluation codes (97161 to 97163) can be billed on the same date of service as treatment codes such as 97110 or 97140, provided that separate documentation supports each service as distinct and medically necessary. Medicare removed the NCCI edit between the evaluation codes and 97140 in 2021, but some commercial payers still ask for Modifier 59. Document each service separately in the patient record on that date, and verify your payer's specific same-day billing policy before submitting.

Q8: What is the GP modifier in physical therapy?

The GP modifier identifies services provided under a physical therapy plan of care. It's required on all PT claims submitted to Medicare and most commercial payers, appended to each CPT code line on the claim. Without GP, the claim is denied or rejected for a missing discipline identifier. The parallel modifiers are GO for occupational therapy and GN for speech-language pathology. GP is not a CPT code; it's a two-character modifier that tells the payer the service falls under a PT plan of care rather than another therapy discipline.

Q9: What are the most common physical therapy billing errors?

The five most common physical therapy billing errors are: a missing or incorrect GP modifier, which generates a CO-4 denial on every affected claim line; incorrect complexity level on evaluation codes, which draws payer audit attention over time; unit calculation errors under the 8-minute rule, which cause both underbilling and overbilling; billing CPT 97014 instead of G0283 on Medicare claims, which results in an automatic denial; and missing the KX modifier above the year's threshold, which causes automatic rejection on all claims above that line. These errors are systematic. One mistake repeats across many claims before it surfaces. The fix is a billing workflow audit, not individual claim appeals.

Q10: What documentation is required for physical therapy CPT codes?

Every timed PT CPT code requires four documentation elements: the specific service performed, the body region treated, the time in minutes, and the connection between the service and a documented functional goal in the plan of care. Medicare adds three more requirements: a current and physician-certified plan of care, objective functional measures with baseline and progress data, and a skilled intervention rationale explaining why a licensed therapist is required. CO-50 denials, meaning not medically necessary, are almost always a documentation gap rather than a clinical one. The service was appropriate. The notes just didn't say so in a way the payer accepts.

Q11: What are the new physical therapy CPT codes for 2027?

The AMA made no changes to core PT treatment or evaluation codes for 2027. The PT code change is biofeedback: 90901 becomes the first 15 minutes, and new add-on 90903 reports each additional 15 minutes. Before that, CPT 2026 created RTM codes 98979, 98984, and 98985, which CMS added to the therapy list.

Q12: Are physical therapy services covered by Medicare telehealth in 2026 and 2027?

Yes. Under CAA 2026 section 6209, CMS extended Medicare telehealth coverage for physical therapists, occupational therapists, and speech-language pathologists through December 31, 2027. The extension includes telephone assessment and management codes 98966, 98967, and 98968. That authorization is temporary, and APTA is actively advocating for permanent status. Billing requires the correct place of service code: POS 02 for telehealth outside the patient's home or POS 10 for telehealth to the patient's home. The GP modifier still applies. Medicare's telehealth extension does not bind commercial payers, so verify each commercial payer's policy separately.

Q13: How do I bill physical therapy under Medicare?

Billing PT under Medicare follows a sequential process:

1. Verify Medicare Part B eligibility before the first visit
2. Obtain physician certification of the plan of care
3. Apply the GP modifier to every PT service line
4. Use the 8-minute rule for all timed CPT codes
5. Track cumulative allowed charges per patient against the year's KX threshold ($2,480 in 2026, $2,540 proposed for 2027)
6. Add the KX modifier with supporting documentation once the threshold is exceeded
7. Submit on CMS-1500 or electronic equivalent

Use G0283 instead of 97014 for unattended electrical stimulation on Medicare claims. Factor MPPR into revenue projections when billing multiple timed codes in a single session. CMS's Claims Processing Manual Ch. 5 should be in your billing reference library and reviewed when payer policy questions arise.

Q14: What is MPPR in physical therapy billing?

MPPR stands for Multiple Procedure Payment Reduction. When a PT patient receives more than one "always therapy" service in a single session, Medicare pays 100% of the practice expense component for the service with the highest PE value and 50% of the PE component for each subsequent service billed that day. Work RVU and malpractice RVU components are not affected. The reduction rate has been 50% since April 2013 and is unchanged in 2026. MPPR is not a denial and is not appealable. It's a built-in payment structure that should be modeled into revenue projections before session structures are designed.

Q15: What is the difference between timed and untimed PT CPT codes?

Timed PT CPT codes are billed in 15-minute units based on the total minutes of skilled intervention provided. The 8-minute rule determines how many units can be billed in a session. Untimed codes are billed once per session regardless of how long the service takes. Evaluation codes 97161 through 97164 are untimed. Supervised modalities like hot packs (97010) and unattended electrical stimulation (97014) are untimed. Most therapeutic procedure codes, including 97110, 97530, 97140, and 97112, are timed. Billing both timed and untimed codes on the same claim is appropriate and routine in PT billing when services are documented correctly.

Q16: Can the same physical therapy CPT codes be used for Medicare and commercial insurance?

Yes, for most codes. AMA CPT codes are used across Medicare and commercial payers. What changes by payer is the modifier requirements, place of service rules, coverage policies for specific codes, and reimbursement rates. The most important Medicare-specific exception is 97014 versus G0283: commercial payers typically accept 97014 for unattended electrical stimulation, but Medicare requires G0283 on Part B outpatient claims. Payer-specific coverage policies for dry needling, RTM codes, and telehealth services vary and must be verified individually before billing those services to non-Medicare patients.

Q17: What happens if I use the wrong physical therapy CPT code?

The outcome depends on the direction of the error. Using a lower-complexity code than the documentation warrants results in underbilling and direct revenue loss. Using a higher code than the documentation supports is upcoding, which is a compliance risk and a potential fraud exposure. Billing a code for a service that isn't documented creates a denial and, after post-payment review, a repayment request. Systemic wrong-code patterns draw targeted audits from CMS contractors. The safest correction path is a proactive billing audit that identifies patterns before a payer does, not after a records request has already arrived.

Q18: What is CPT code 97164 used for?

CPT code 97164 is the physical therapy reevaluation code. It's untimed, billed once per reevaluation regardless of time spent, and requires documented change in the patient's clinical status or condition since the last evaluation. Use it when the treating therapist determines a formal reassessment is needed due to unexpected progress, clinical decline, or a change in diagnosis. Most payers require a minimum number of treatment visits between reevaluations before they'll accept 97164 on a claim. Billing 97164 at routine intervals without a documented change in clinical status is a consistent denial trigger across Medicare and commercial payers.

Q19: What is the difference between CPT codes 97161, 97162, and 97163?

CPT 97161, 97162, and 97163 are the three complexity tiers for a PT initial evaluation. 97161 has no personal factors or comorbidities affecting the plan, an exam of 1 to 2 elements, and a stable presentation. 97162 has 1 to 2 personal factors or comorbidities, 3 or more elements, and an evolving presentation. 97163 has 3 or more personal factors or comorbidities, 4 or more elements, and an unstable presentation. Typical times run 20, 30, and 45 minutes, but findings decide the code.

Q20: What is the CPT code for pelvic floor therapy?

Pelvic floor biofeedback uses 90912 for the first 15 minutes of one-on-one contact and 90913 for each additional 15 minutes. Other pelvic floor treatment bills on standard PT codes such as 97110, 97112, 97140, and 97530, with the evaluation on 97161 to 97163. Medicare covers biofeedback for urinary incontinence after a documented four-week trial of pelvic muscle exercise fails.

Q21: Does Medicare accept CPT 97014?

No. Medicare doesn't recognize 97014. For unattended electrical stimulation outside wound care, Medicare Part B claims use HCPCS G0283. Most commercial payers still accept 97014, and some follow Medicare's rule. Set your billing system to choose the code by payer so a 97014 line never reaches a Medicare claim.

Q22: What is HCPCS code G0151?

G0151 reports services of a qualified physical therapist in the home health or hospice setting, each 15 minutes. Home health agencies and hospices bill it on institutional claims. It isn't priced on the physician fee schedule, so outpatient PT practices billing Part B don't use it.

Q23: What is CPT code S9131?

S9131 is a HCPCS Level II code for physical therapy in the home, billed per diem. It's an S code, a temporary national code that some commercial and Medicaid plans accept. Medicare doesn't pay S codes, so check each payer's contract or fee schedule before you bill S9131.

Q24: What is the biofeedback CPT code for 2027?

From January 1, 2027, 90901 reports the first 15 minutes of biofeedback training with direct patient contact. New add-on 90903 reports each additional 15 minutes. Before 2027, 90901 was billed once per session. Pelvic floor biofeedback stays on 90912 and 90913. Medicare values for 90901 and 90903 stay proposed until the final rule.

How MedSole RCM Helps Physical Therapy Practices Maximize Reimbursement

Most PT practices have a billing problem they can't see from the inside. The physical therapy CPT codes look right. Claims are going out on time. But somewhere between charge capture and payment posting, revenue is leaking. The leaks are usually small per claim and significant in aggregate, and they don't show up until the AR aging report starts looking worse than it should.

Everything covered in this guide, code selection rules, modifier requirements, 8-minute rule calculations, KX threshold tracking, and the denial prevention checklist, is what our billing team manages every day for PT practices. It's not a framework we consult. It's the actual workflow we run on every account.

Three specific things we do that address the problems documented in this guide:

• Track KX thresholds per patient across the full calendar year, so no claim goes out above the year's threshold without the modifier
• Audit modifier setup by payer to eliminate the systematic CO-4 denials that hit practices running the same billing system configuration for every payer
• Review 8-minute rule calculations on timed code claims before submission to catch both underbilling and overbilling before they leave the practice

A practice manager running a full caseload can't track all of this simultaneously. That's a capacity reality, not a criticism. Physical therapy billing services exist because the billing layer requires dedicated attention that clinical operations can't consistently provide alongside patient care.

If your practice wants tighter billing without adding headcount, our outsourced physical therapy billing team runs this workflow for you.