Physical Therapy and Physiotherapy Billing Services by Prospect Healthcare Solutions
Physical therapy billing services cover the coding, claims, denials and payments for outpatient rehab care: evaluations, timed treatment units, therapy modifiers and plan-of-care rules. Prospect Healthcare Solutions handles this full revenue cycle for physical therapy and physiotherapy clinics, private practices and multi-location rehab groups, so your therapists can spend their time on patients instead of paperwork.
PT claims look simple but carry strict rules. Units depend on documented minutes, Medicare needs GP, CQ and KX modifiers in the right places, and plans of care must be certified on time. We code every visit from the treatment note, check each payer’s rules and follow every claim until it is paid.
Prefer to talk? Call +1 (469) 935-4617.
Why Physical Therapy Billing Needs Special Expertise
Most physical therapy services are billed in timed units, so one missing minute or modifier can cut what you are paid or trigger a denial. Medicare, Medicaid and commercial plans each count units, limit visits and review medical necessity differently.
Common challenges include:
- Converting treatment minutes to units correctly
- GP, CQ, KX and 59/X modifiers applied in the right places
- Plan-of-care certifications and progress reports on time
- Visit limits and prior authorization on commercial plans
- NCCI edits between therapy codes billed on the same day
- Timely filing limits that differ by payer
Physical Therapy Payer Rules We Manage
These are the therapy-specific rules our revenue cycle management team checks on every claim:
Timed codes and the 8-minute rule
What it means: Medicare counts units for timed codes such as 97110, 97112, 97140 and 97530 from the total timed minutes of the visit (8 to 22 minutes is 1 unit, 23 to 37 minutes is 2 units). Some commercial payers count each code separately.
How we handle it: We total the timed minutes in the note and bill the units each payer’s method allows.
GP and KX modifiers
What it means: Medicare requires modifier GP on every physical therapy service. Once a patient’s therapy costs pass the annual threshold Medicare sets each year, claims need modifier KX to confirm continued therapy is medically necessary and documented.
How we handle it: We track each patient’s therapy spending and add KX only when the note supports continued care.
Services by physical therapist assistants
What it means: When a physical therapist assistant provides all or part of a service, Medicare requires modifier CQ and pays 85% of the fee schedule amount.
How we handle it: We check who provided each service and apply CQ where the documentation shows assistant involvement.
Plan of care certification
What it means: Medicare requires a physician or other qualified provider to certify the plan of care, usually within 30 days of the first visit, and recertify it at least every 90 days. Progress reports are needed at least every 10 treatment days.
How we handle it: We track certification, recertification and progress report dates so claims are not sent without them.
Evaluations and re-evaluations
What it means: Evaluations are billed by complexity (97161–97163). A re-evaluation (97164) is paid only when there are new clinical findings or a significant change, not on a routine schedule.
How we handle it: We match the evaluation code to the documented complexity and bill re-evaluations only when the note supports one.
Procedures billed together
What it means: NCCI edits pair some therapy codes, such as manual therapy (97140) with therapeutic activities (97530). They are paid together only when performed in separate time periods, with modifier 59 or XU.
How we handle it: We check the timing in the note and add the modifier only when separate time is documented.
Our Complete Physical Therapy Billing Services
We manage the full therapy revenue cycle, from patient intake to final payment.
1. Insurance Verification and Authorizations
Before the first visit we confirm coverage, therapy benefits, remaining visits, copays and any prior authorization, so treatment is not interrupted and claims are not rejected for eligibility.
2. Therapy Coding and Documentation Review
Certified coders assign CPT and ICD-10-CM codes, units and modifiers from each treatment note, and confirm the note supports every service billed. See our medical coding services and our guide to ICD-10 codes for physical therapy.
3. Clean Claim Submission
Claims are scrubbed for unit, modifier and NCCI errors before they go to Medicare, Medicaid and commercial plans, then tracked until paid, with rejections corrected the same day.
4. Denial Management and Appeals
Every therapy denial is worked through a structured process:
- Root cause analysis (units, modifiers, authorization or documentation)
- Corrected claims
- Appeals supported by treatment notes and the plan of care
See our denial management services.
5. Payment Posting, AR Follow-Up and Billing Audits
We post and reconcile payments, follow up on unpaid claims, and audit coding, units and modifiers to find gaps before payers do. Learn about our medical billing audits.
Common Physical Therapy Denials and How We Fix Them
Example: manual therapy denied with therapeutic activities
The denial. Manual therapy (97140) and therapeutic activities (97530) are billed on the same day, and 97140 is denied with CARC 236 (this combination is not compatible under the payer’s coding edits).
How we fix it:
- Review the note. We check whether each service was performed in its own documented time period.
- Add the modifier. If the times were separate, we add modifier 59 or XU to 97140.
- Correct and resubmit. We send the corrected claim, or appeal with the treatment notes if the payer requires them.
- Prevent the next one. We check paired codes and documented times on every claim before it goes out.
Example: therapy denied after the annual threshold
The denial. A Medicare patient’s visit is denied with CARC 119 (benefit maximum for this time period has been reached) because the claim was sent without modifier KX after the patient passed the annual therapy threshold.
How we fix it:
- Check the documentation. We confirm continued therapy was medically necessary and documented.
- Resubmit with KX. If it was, we add KX and send the corrected claim.
- Check the ABN. If it was not, the visit is billed to the patient only when an ABN was signed before treatment.
- Prevent the next one. A threshold check runs on every Medicare therapy claim.
Specialized Physical Therapy Billing Services
Outpatient and Private Practice PT
We bill evaluations, therapeutic exercise, manual therapy and other timed services for private practices and outpatient clinics, with units and modifiers checked on every claim.
Orthopedic and Post-Surgical Rehab
We bill rehab after fractures, joint replacement and sports injuries, coordinating with the surgeon’s global period and plan of care. See our orthopedic billing services.
Telehealth and Remote Therapy
We bill virtual PT visits and remote therapeutic monitoring where payers cover them, with the right place of service and modifiers. See our telehealth billing services.
Physical Therapy CPT Codes, Timed Units and Therapy Modifiers
These are the therapy codes and modifiers we work with most. Unit and modifier rules vary by payer, so we confirm each one before billing.
| Service | Codes | What we check |
|---|---|---|
| Evaluations | 97161 low, 97162 moderate, 97163 high complexity; 97164 re-evaluation | Complexity documented; re-evaluation supported by a change |
| Timed treatment codes | 97110, 97112, 97116, 97140, 97530 | Units from total timed minutes (8-minute rule for Medicare) |
| Untimed services | 97010–97028 (e.g., 97014 unattended e-stim; Medicare uses G0283) | One unit per visit; payer code variants |
| Therapy modifiers | GP on all PT services; CQ for PTA services | Modifier matches who provided the service |
| Threshold and edits | KX after the annual threshold; 59 or XU for separate procedures | Spending tracked; separate time documented |
| Plan of care | Certification and recertification at least every 90 days | Signed certification on file before billing |
Why Outsource Physical Therapy Billing Services?
In-house billing means hiring, training and keeping staff current on therapy rules, and one missed update can affect every claim. Outsourcing to Prospect Healthcare Solutions gives you:
- Lower operating costs
- Fewer unit and modifier errors
- Faster reimbursement
- Higher collections
- Stronger compliance
Built for Growing PT Practices
- Dedicated therapy billers
- Certified coders and billers
- HIPAA-compliant processes
- Regular audits and quality checks
- Workflows customized to your practice and EMR
Physical Therapy Billing Compliance
Therapy claims are a frequent audit target, and we follow CMS and payer rules to reduce your risk. Compliance is built into every step:
- Units supported by documented minutes
- Correct GP, CQ, KX and 59/X modifier use
- Certified plans of care and timely progress reports
- Medical necessity documented for every visit
- ABNs on file before non-covered care
Learn about our medical billing audits.
Who We Serve
Our physical therapy billing services support practices of every size:
- Private physical therapy and physiotherapy practices
- Outpatient rehab clinics
- Multi-location therapy groups
- Sports medicine and orthopedic rehab centers
- Physical therapists and physical therapist assistants
- Practices that also offer chiropractic care
Technology and Reporting for PT Billing
We work in your EMR and practice management system and use billing analytics to catch problems early:
- Real-time claim tracking
- Denial trends by payer and code
- Visit and authorization tracking by patient
- Secure, HIPAA-compliant data handling
Clear monthly reports show collections, denials and outstanding AR, so you always know where your revenue stands.
Physical Therapy Billing FAQs
What are physical therapy billing services?
They cover insurance verification, coding, claim submission, denial management and payment posting for physical therapy and physiotherapy care, including evaluations, timed treatment units and therapy modifiers.
What is the 8-minute rule?
It is Medicare’s method for timed codes: total timed minutes for the visit are added up and converted to units, with at least 8 minutes needed for one unit.
When is the KX modifier used?
Once a patient reaches Medicare’s yearly therapy threshold, KX confirms that continued therapy is medically necessary and documented in the record.
What is the CQ modifier?
CQ marks Medicare services furnished in whole or in part by a physical therapist assistant. Medicare pays these at 85% of the fee schedule amount.
Is physiotherapy billing the same as physical therapy billing?
Yes. In the U.S., physiotherapy is billed as physical therapy, using the same CPT codes, GP modifier and payer rules.
How do I get a quote for physical therapy billing?
Request a free billing quote online or call +1 (469) 935-4617. We review your current billing and send a plan and pricing.
Partner with Experts in Physical Therapy Billing Services
Your therapists help patients move again. We handle the coding, claims, denials and compliance so your practice gets paid accurately and on time for every visit.
Tell us about your practice for a free quote, or call +1 (469) 935-4617.