Buyer's guide
The best physical therapy billing service depends on who does the work.
Physical therapy is billed in timed units, and the details are where money quietly leaks. A visit earns only so many units, some work needs a special modifier, and an assistant's time is paid less.
At a glance.
| Product | Best for |
|---|---|
| Altair | Physical therapy clinics with no billing team of their own. |
| WebPT RCM | Rehab clinics that want a rehab-specialized team working their claims. |
| ARIA RCM | Practices that want a large multi-specialty operation with physical therapy coding depth. |
| Practice Perfect | Clinics that want to run their own software with billing built in. |
Time-based therapy codes bill in 15-minute units, and one unit needs at least 8 minutes of one-on-one care, so 8 to 22 minutes counts as one unit and 23 to 37 minutes counts as two.
The landscape, by who does the work.
Every option here touches physical therapy billing, but the models differ. Some are services where billers work your claims off your desk, some rehab-specialized and some generalist. Some are software your clinic runs itself. Altair is the done-for-you model, run by AI and backed by our in-house billers, on the systems you already use.
Done for you, run by AI and backed by expert billers
Altair works the claims. Our billers handle the exceptions. Nothing comes back to your front desk.
Altair
Runs the whole claim on the systems you already use. Checks each claim against the payer's current policies before it goes out, including the 8-minute unit math on timed codes, the KX modifier threshold, the CQ modifier for assistant-delivered work, and a current plan of care, so the ones that would deny get caught first. Works denials on arrival, files appeals, posts payments, and sends patient statements. Our in-house billers work the exceptions.
Best for: Physical therapy clinics with no billing team of their own.
Physical-therapy and rehab billing services
People who bill physical therapy and rehab, off site, under a service contract.
WebPT RCM
A physical-therapy and rehab billing service that works as your outsourced billing team: claim submission, denial management and appeals, insurance and patient collections, payment posting, and reporting. It pairs its team with AI-powered workflows and AI trained on a large rehab-specific data set.
Best for: Rehab clinics that want a rehab-specialized team working their claims.
HENO
A physical-therapy, occupational-therapy, and speech-therapy billing service covering claim submission, denial management and appeals, payment posting, patient statements, accounts receivable follow-up calls, eligibility, and prior authorization, staffed by its certified billing team. It also offers integrated EMR and billing software, so a clinic can take the service, the software, or both.
Best for: Rehab clinics that want a rehab-specialized biller with the option to run its software.
PT Billing Services
A physical-therapy billing service handling electronic claim submission, billing, physical-therapy practice management, and patient billing.
Best for: Physical therapy practices that want a PT-focused billing service.
PhysioBilling
A physical-therapy and occupational-therapy billing service covering billing, insurance verification, front-desk training, and consulting. It works with any EMR or practice-management software.
Best for: Physical and occupational therapy practices that want billing plus front-desk support.
MEG Business
A service for physical therapy private practices covering billing, a virtual front desk, credentialing, compliance, training, and consulting, delivered as a managed people service.
Best for: Private physical therapy practices that want billing bundled with practice consulting.
Multi-specialty billers with a physical therapy line
Generalist billing companies that serve many specialties including physical therapy.
ARIA RCM
A multi-specialty revenue-cycle service from CGM, serving more than 70 specialties with a dedicated physical therapy line: claim scrubbing, denial management, medical-necessity appeals, accounts receivable, and payment posting, with physical therapy coding and modifier expertise. It pairs its team with AI-driven audits, automated alerts, and smart claim scrubbers. Credentialing is a separate service.
Best for: Practices that want a large multi-specialty operation with physical therapy coding depth.
Sirius Medical Billing
A billing service for allied and complementary therapies, including physical therapy, occupational therapy, speech, massage, mental health, substance use, chiropractic, and acupuncture: insurance and patient billing, electronic claim filing and tracking, accounts receivable cleanup, statements, and eligibility. Built for small offices of one to four providers.
Best for: Small physical therapy offices that want a biller across allied therapies.
In Touch Billing
A multi-specialty billing service covering rehab, physical therapy, occupational therapy, chiropractic, physicians, and pain management, with full revenue-cycle management that includes coding and auditing, denial management, eligibility, credentialing, payer-contract renegotiation, and claim scrubbing. It runs automation for coding edits, modifier checks, and electronic remittance posting. It also offers EMR and biller software, so a clinic can hire the service or run the tools itself.
Best for: Multi-specialty and rehab practices that want billing and coding handled together.
Software you run
Not a biller you hire. Software your clinic runs itself, with billing built in. Listed so the comparison is honest.
Practice Perfect
An EMR and practice-management system the clinic runs, with scheduling, billing and payments, analytics, and a patient portal, plus an optional collections service for United States clinics. It includes AI-assisted documentation and dictation.
Best for: Clinics that want to run their own software with billing built in.
Based on publicly available vendor information, current as of August 2026. Vendor names are trademarks of their respective owners and are not affiliated with Altair.
Choosing a physical therapy biller, answered.
What should a physical therapy practice look for in a billing service?
Start with who does the work. Does the service work your claims, or hand you software to run? Then ask whether it knows physical therapy's billing details: the 8-minute unit math on timed codes, the KX modifier once therapy spend passes the annual threshold, the CQ modifier for work done by an assistant, and a current plan of care, and whether it checks each claim against them before submission. Then integration: does it run on the systems you already use, or force a migration.
Do I need a physical-therapy-specialized biller?
It helps. Physical therapy denials come from unit math, medical-necessity thresholds, and modifier details that a generalist biller can miss, so a service that knows the 8-minute unit math and the KX and CQ modifiers will catch more before submission. Specialization matters less than whether the service checks each claim against the payer's current policies and works the denials.
Why do physical therapy claims deny so often?
Timed codes bill in 15-minute units and need at least 8 minutes of one-on-one care per unit, so miscounted minutes deny. Once a patient's therapy spend passes the annual threshold, the claim needs the KX modifier attesting medical necessity. Work done in part by a physical therapist assistant needs the CQ modifier, the plan of care has to stay certified, and payers differ on what they allow. Any one of these missing on the claim is a denial, even when the care was justified.
Can Altair do our physical therapy billing if we have no biller on staff?
Yes. Altair is the done-for-you billing service for practices with no billing team, run by AI and backed by our expert in-house billers. Altair checks each claim against the payer's current policies before it goes out, works the denials, files appeals, and sends patient statements.