Specialty billing guide
Best Medical Billing Companies for Physical Therapy
The short answer
Ten firms state physical therapy billing focus on their own sites, listed alphabetically with no rankings. Below: the 8-minute rule, authorizations, and vendor questions.
Physical therapy billing is unit math under time pressure. Timed codes, the 8-minute rule, authorization visit counts, and documentation that ties every unit to medical necessity make PT one of the most detail-dense billing environments in outpatient care.
The practices that collect well treat each visit as a small puzzle: the right codes, the right units, the right modifiers, matched to the authorized visit count and the plan of care. Get any piece wrong and the whole visit underpays.
Ten firms in our directory state physical therapy billing focus on their own websites, listed below in alphabetical order. Nothing is ranked, reviewed, or paid for. After the listings we cover the PT-specific rules and the questions worth asking any vendor.
Medical billing companies for physical therapy
Matched by specialty focus stated on each firm's own site. Listed alphabetically; featured slots are paid and labeled.
11 firms listed
Medical billing services, including therapy practices.
Physical Therapy
Billing for cardiology, primary care, pain management, nephrology, rheumatology, oncology, and physical therapy practices, plus pathology and genetic testing labs.
Bingham Farms, MI
Cardiology · Physical Therapy · Oncology
Medical billing company offering billing, enrollment, eligibility verification, and denial management; serves rehab, behavioral health, and urgent care.
Behavioral Health
Home health billing and credentialing; also serves internal medicine, cardiology, orthopedics, mental health, pediatrics, physical therapy, chiropractic, and surgical practices.
St. Petersburg, FL
Orthopedics · Cardiology · Pediatrics
Billing services for physical therapy practices.
Physical Therapy
Billing and coding for physicians, dentists, chiropractors, behavioral health, ABA, and physical and occupational therapy providers.
Portland, OR
Behavioral Health · Dental · Physical Therapy
Billing for physical, occupational, and speech therapy, chiropractic, pain management, primary care, cardiology, and allergy practices.
Englewood, NJ
Cardiology · Physical Therapy
Billing services for physical, occupational, and speech therapy providers.
Clare, MI
Physical Therapy
Billing for workers compensation, pain management, internal and family practice, and physical therapy.
San Antonio, TX
Physical Therapy
Billing for podiatry, dermatology, allergy and immunology, cardiology, pain management, psychology, orthopedic surgery, and physical therapy practices.
Voorhees Township, NJ
Dermatology · Orthopedics · Cardiology
Revenue cycle management for physical therapy and rehab practices.
Fort Lauderdale, FL
Physical Therapy
10
firms in our directory stating physical therapy billing focus
Source: BillingFirms directory data (verified 2026-10-01)
11.8%
average first-pass claim denial rate
Source: Kodiak Solutions
4-10%
percentage-of-collections range most billing vendors advertise
Source: billing vendor pricing guides
The 8-minute rule
Medicare's 8-minute rule determines how timed PT codes convert minutes into billable units, and it is the single most misunderstood rule in therapy billing. Misapplying it means systematically billing the wrong number of units on every visit.
Timed versus untimed codes add another layer. Therapeutic exercise and manual therapy are timed, while evaluations and some modalities are not. Your vendor's coders need to live inside these distinctions, because documentation review is where unit errors get caught before they become denials.
Authorization math
Most payers authorize PT in visit counts, and every visit draws down the balance. Treating past the authorized count without a re-auth means working for free. The biller's job is tracking visit balances per patient and flagging re-auth needs before the last authorized visit.
The KX modifier and therapy threshold add federal complexity for Medicare patients. Exceeding the threshold without the modifier and supporting documentation triggers denials. A PT biller should handle this routinely, not as a special project.
Documentation that supports the units
Every billed unit needs documentation showing what was done, for how long, and why it was medically necessary. Plans of care must be certified and recertified on schedule. Payers auditing PT claims go straight for the documentation, and thin notes lose appeals.
Good PT billers review documentation proactively and send it back when it will not support the claim. If a vendor never pushes back on your notes, they are not really reviewing them.
What to ask a physical therapy billing vendor
Use these questions on every sales call. PT billing is too rules-driven for improvisation.
- How do you audit 8-minute rule compliance across visits?
- How do you track authorization visit balances per patient?
- Do you review documentation before claims go out, and what gets sent back?
- How do you handle KX modifiers and the therapy threshold?
- Can I speak with two current PT clients?
Frequently asked questions
What is the 8-minute rule in physical therapy billing?
The 8-minute rule is Medicare's method for converting treatment minutes into billable units for timed codes. At least 8 minutes of a timed service is needed to bill one unit, with additional units earned in roughly 15-minute increments. Misapplying this rule causes systematic unit errors, so any PT biller must demonstrate fluency with it.
How much does physical therapy billing cost?
PT billing vendors commonly advertise 4 to 10 percent of collections, with smaller practices sometimes offered flat monthly fees. Because PT visits generate many small claims, clarify whether the percentage applies to all collected revenue and whether authorization management is included. Per-visit pricing models also exist in this specialty.
What is the KX modifier?
The KX modifier signals that therapy services above Medicare's annual threshold are medically necessary and documented as such. Claims over the threshold without the KX modifier are denied. Your biller should track threshold spending per patient and apply the modifier with supporting documentation as a matter of routine.
Why do PT claims get denied so often?
Authorization exhaustion is the top cause: visits delivered beyond the authorized count. Documentation gaps run second, especially notes that do not support the billed units or a lapsed plan of care. Both are preventable with visit tracking and documentation review, which is exactly what a PT-specialized biller should provide.
Should PT documentation be reviewed before billing?
Yes. In physical therapy, the documentation is the claim's defense, and payers audit PT notes aggressively. A biller who reviews notes before submission and sends weak documentation back for correction prevents denials instead of appealing them. Ask vendors directly whether pre-bill documentation review is part of their service.
How this list was made
Firms on this page are matched from the BillingFirms directory's verified data. A firm appears when physical therapy billing focus is stated on the firm's own public website, matched by our specialty taxonomy or specialty keywords. Listings are alphabetical. Nothing is ranked, reviewed, or vetted, and no firm currently holds a Featured placement.
Keep exploring
Not sure which firm fits your practice?
Get matched free