Physical therapy billing services for outpatient clinics
Fastora provides physical therapy billing services for outpatient clinics and private practices, from benefit checks through payment posting and appeals. PT claims are built on minutes, modifiers and plan-of-care dates rather than a single visit code, so the claim has to show how long each timed service lasted, which discipline delivered it, and that a certified plan of care covered the date of service.
Physical therapy insurance billing also carries more payer variety than many specialties. One clinic may bill Medicare, Medicare Advantage, commercial plans with visit caps, Medicaid, workers’ compensation carriers and auto insurers in the same week, each with its own unit logic and approval steps. A small error in how minutes convert to units, or a missing modifier, repeats on every visit of an episode until someone catches it.
PT billing we handle, from intake to closed claim
Our PT billing services cover the full physical therapy revenue cycle management chain, so front-desk errors do not surface weeks later as denials. Every claim is handled by certified medical billing and coding professionals.
- Eligibility and benefits: active coverage, copay or coinsurance, deductible, visits used and remaining, and whether authorization is needed.
- Authorization requests and tracking of approved visits, units and date ranges.
- Charge review: CPT codes, units against documented minutes, GP, KX, CQ and NCCI modifiers, and diagnosis pointers.
- Advanced Pre-Submission Claim Review (our claim scrubbing step) before electronic submission.
- ERA and EOB payment posting, with underpayments flagged against your fee schedule.
- Denial management, appeals and AR follow-up by payer and age.
- Patient statements and payment plans for deductibles and coinsurance.
Physical therapy RCM is less about any one step than about the hand-offs between them. A visit count recorded at intake has to reach the scheduler, and a plan-of-care date has to reach the biller before the claim drops, which is why we track those dates in one place.
Timed codes and the 8-minute rule
CPT splits therapy codes into two groups. Service-based (untimed) codes, such as the evaluation codes, are billed once per session no matter how long they take. Timed codes are billed in 15-minute units, and the number of units depends on documented direct treatment minutes.
For Medicare, the 8-minute rule governs how timed minutes become units. Total timed minutes for the visit are added together, and a unit can be billed once at least 8 minutes are reached. As a working reference, 8 to 22 minutes supports one unit, 23 to 37 minutes supports two, and each further 15 minutes adds another. When minutes are spread across several timed codes, a leftover unit goes to the service that took the most time. Estimate billable units with our 8-minute rule calculator.
Commercial payers may apply different unit rules. Some count each timed code on its own, so a service needs 8 minutes by itself to earn a unit. We set unit logic by payer and contract rather than billing every plan the same way.
| Code | Descriptor (summary) | Billing unit |
|---|---|---|
| 97161 | Physical therapy evaluation, low complexity | Untimed, once per session |
| 97162 | Physical therapy evaluation, moderate complexity | Untimed, once per session |
| 97163 | Physical therapy evaluation, high complexity | Untimed, once per session |
| 97164 | Re-evaluation of physical therapy established plan of care | Untimed, once per session |
| 97110 | Therapeutic exercises to develop strength and endurance, range of motion and flexibility | Each 15 minutes |
| 97112 | Neuromuscular reeducation of movement, balance, coordination, kinesthetic sense, posture and/or proprioception | Each 15 minutes |
| 97116 | Gait training (includes stair climbing) | Each 15 minutes |
| 97140 | Manual therapy techniques, one or more regions | Each 15 minutes |
| 97530 | Therapeutic activities, direct one-on-one patient contact, using dynamic activities to improve functional performance | Each 15 minutes |
Evaluation level depends on history, body systems examined, clinical presentation and decision-making, and the note has to support the tier billed. Some code pairs, such as 97140 with 97530, are subject to National Correct Coding Initiative edits on the same day; modifier 59 or an X-series modifier is added only when the record shows distinct services at distinct times. Our PT billing guide walks through more code-level examples.
Medicare physical therapy billing: KX, CQ and the plan of care
GP modifier and the KX threshold
Medicare requires a discipline modifier on every outpatient therapy line: GP for services under a physical therapy plan of care. Many commercial and Medicaid plans follow suit, and a missing GP modifier commonly causes rejected lines.
Medicare no longer applies a hard therapy cap. It sets a per-beneficiary threshold each calendar year for physical therapy and speech-language pathology combined, with a separate threshold for occupational therapy. CMS publishes the amounts annually on its therapy services page, so we check the current figure rather than relying on last year’s number. Once a patient’s year-to-date PT and SLP charges pass the threshold, each further line needs the KX modifier, which attests that the services are medically necessary and documented. Because the threshold follows the patient, therapy received elsewhere earlier in the year counts too.
For 2026, that combined physical therapy and speech-language pathology threshold is $2,480 per beneficiary (CMS, 2026 Annual Update of Per-Beneficiary Threshold Amounts). The amount changes each calendar year — check the current figure on CMS’s Therapy Services page.
A second, higher amount triggers targeted medical review. Not every claim above it is reviewed, but clinics whose patients regularly pass that level should expect documentation requests and keep progress notes current.
Plan of care certification and progress reports
Medicare pays for outpatient therapy only under a written plan of care certified by a physician or nonphysician practitioner. The plan lists diagnoses, long-term goals, and the type, amount, frequency and duration of therapy. Certification is timely when obtained within 30 days of the initial treatment; recertification is required when the plan changes significantly and at least every 90 days, and progress reports are due at least once every 10 treatment days. We track these dates so visits are not delivered on a lapsed plan.
CQ modifier for PTA services
Services furnished in whole or in part by a physical therapist assistant carry the CQ modifier alongside GP and are paid at a reduced rate. CMS applies a de minimis standard, so CQ is required when the assistant’s minutes exceed 10 percent of the service. Supervision rules depend on the setting, the payer and the Texas or other state practice act, so we confirm them before assistant visits go on the schedule.
Authorizations and visit tracking
Commercial plans often limit PT to a set number of visits per year, sometimes shared with occupational therapy, speech therapy or chiropractic care. Many Medicare Advantage and commercial plans also require authorization before treatment starts or after an initial block of visits.
When an authorization is approved, we record the approved visits, units and date range against the patient’s schedule. Cases are flagged before either runs out, so the therapist can send updated objective measures and goals while there is still time for review. Visits scheduled past the end date are caught before they are delivered, not after the denial arrives.
- Visits used at other providers are confirmed with the payer, since commercial limits and the Medicare threshold both follow the patient.
- Pooled PT/OT/speech limits are tracked as one count where the plan pools them.
- Approval numbers are attached to every claim line that needs them.
Workers’ comp and personal injury claims
Injury claims follow the carrier’s rules, not the health plan’s. Before the first visit we collect the employer, date of injury, claim number and adjuster contact, and confirm which treatment the carrier has approved.
In Texas, workers’ compensation rules at 28 Texas Administrative Code §134.600 list physical and occupational therapy among services that need preauthorization. The rule exempts the first six visits after the evaluation when they occur within two weeks of the date of injury or of a surgery the carrier preauthorized. Other states set their own rules and fee schedules, so we check them claim by claim.
Auto and personal injury protection claims follow policy limits and state law, and the patient’s health plan may deny until auto coverage is exhausted or documented. When an auto carrier closes a claim for exhausted benefits, we move the balance to the health plan with the carrier’s letter rather than writing it off.
Physical therapy denial management, including therapy cap and visit-limit denials
Most PT denials involve modifiers, units that do not match documented minutes, visits outside the approved count or dates, lapsed certification or medical necessity. Therapy cap and visit-limit denials often trace back to benefits another provider used first.
- Threshold denials: confirm KX was appended and the record supports continued care, then correct and resubmit.
- Visit-limit denials: confirm benefits used with the payer, then request an extension or appeal with progress data where the plan allows.
- Authorization denials: check whether visits fell outside approved dates or units, and request retro review only where the payer’s policy permits it.
- NCCI denials: confirm the note supports distinct services before adding 59 or an X modifier.
- Medical necessity denials: appeal with the plan of care, objective measures and progress notes.
Each denial is logged by reason code and payer through our therapy denial workflow, so a pattern such as missing GP modifiers is fixed at the front end instead of appealed one claim at a time. Open claims are worked by payer and age, and appeals go out before filing limits pass.
Physical therapy credentialing services for PTs and PTAs
Each physical therapist needs an NPI, a state license, a CAQH profile where payers use it, and enrollment with each plan. Therapists in private practice enroll with Medicare individually and reassign benefits to the group. Physical therapist assistants do not enroll with Medicare as billing providers; their services are billed under the supervising PT.
Our credentialing and enrollment team tracks each application through a nine-stage process, from document collection and NPI and CAQH setup through payer applications, follow-ups and final approval, until the therapist is ready to bill. New hires are flagged so they are not scheduled with a payer before their effective date.
Outsourced physical therapy billing with Fastora
Our Virtual Assistant team verifies benefits, remaining visits and authorization before the first visit and collects copays upfront. Scriber support records documentation in your EHR in real time, including timed minutes. Certified billers then handle physical therapy billing and coding, claims, payment posting, denials and AR.
Fastora works inside your existing EHR/PM system under the user access you grant, with no software to install and no hidden setup fees. If your clinic documents and bills in WebPT, we work in your WebPT account as your billing team; we are not a WebPT partner and do not claim an official integration. You get a dedicated account contact, transparent dashboards and a monthly review call.
When you compare physical therapy billing companies, ask how each one sets unit logic by payer, tracks plan-of-care and authorization dates, and reports denials by root cause. Pricing is quoted after a free billing assessment and may be a percentage of collections, a flat fee per claim or a hybrid; our pricing page explains each model. Clinics that also offer occupational or speech therapy can see our multi-discipline rehab billing, and organizations with counseling services can review our behavioral health billing.
Physical therapy billing for Medicare
Physical therapy billing for Medicare follows its own rulebook. The GP modifier physical therapy claims carry on every line identifies the services as delivered under an outpatient therapy plan of care, the KX modifier goes on once the annual threshold is crossed to attest medical necessity, and the 8-minute rule decides how many units each timed code supports. Getting physical therapy coding right means matching every timed and untimed code to the note — and to the 8-minute math — before the claim is built. The 59 modifier physical therapy coders use applies when two procedures in the same session count as distinct services — it works, but only with documentation that clearly supports the separation, since payers watch it closely. See our physical therapy billing guide, 8-minute rule, KX modifier for the code-level detail.
Outsourcing physical therapy billing: cost and credentialing
Practices that outsource physical therapy billing usually do it for two reasons: cleaner claims and steadier follow-up than a busy front desk can manage. Physical therapy billing service cost is typically quoted as a percentage of collections or a flat monthly fee, set after looking at visit volume, payer mix, and whether old A/R cleanup is included. When comparing the best physical therapy billing companies, ask whether physical therapy credentialing and billing are handled by the same team — enrollment delays are one of the most common reasons new claims sit unpaid. As a physical therapy medical billing company, we keep private practice physical therapy billing inside one workflow: eligibility and authorizations before the visit, coding review after it, and denials worked the week they arrive.