Specialty
Physical therapy billing services
Physical therapy billing services turn each visit's timed and untimed codes into a claim that survives the payer's unit rules, the plan of care requirement and the visit limits most plans impose.
See where claims are getting stuck. No patient data needed.
Remitwright gives PT clinics a dedicated biller who counts minutes the way Medicare does, tracks certifications and authorizations by date and visit, applies GP, KX, CQ and the X modifiers where the documentation supports them, and works every denial to its cause.
Physical therapy billing is one of Remitwright's specialty billing services, each set out with its own code families, denial reasons and payer rules.
Last reviewed by the Remitwright billing team. Editorial policy
- 97010-97028
- 97110
- 97161-97164
Denials
Why physical therapy claims get denied
The reasons that come up most on physical therapy remittances, with the usual cause and the fix. Code explanations are our own; the official list is maintained by X12.
| Code | Reason | Usual cause | The fix |
|---|---|---|---|
| CO-4 | Procedure inconsistent with the modifier | GP missing, 59 used where the payer wants an X modifier, or CQ missing on an assistant-delivered service | Payer-specific scrubber rules for GP, CQ and the X modifiers; corrected claim sent as a replacement, not a new claim |
| CO-119 | Benefit maximum reached | A visit or dollar limit exhausted without anyone counting, and the patient never told | Record the limit on the appointment at eligibility, recheck monthly, and have the self-pay conversation before the capped visit |
| CO-197 | Authorization absent or exceeded | Visits beyond the authorized count or end date, or a plan that required authorization from the first visit | Track authorized visits and dates against the schedule and request renewal before the last authorized visit |
| CO-97 | Bundled, not separately payable | A modality billed with a timed code the payer bundles, or two paired timed codes billed without a distinct-service modifier | Run NCCI edits before release and bill the distinct service with the right modifier only when the note shows separate time |
| CO-151 | Units exceed what the payer allows | Minutes converted to units generously, such as four units billed for thirty-eight minutes | Count total timed minutes the way the payer's rule says and document start and stop times or total minutes per code |
| CO-50 | Not medically necessary | Plan of care expired or never certified, progress notes missing at the required interval, or maintenance care billed as skilled therapy | Certification and progress note dates on a calendar; claims past the certification date held until it is signed |
Codes
Common physical therapy codes and modifiers
Code families by number with our own one-line explanations. CPT descriptors belong to the AMA and are not reproduced here.
| Codes | What the family covers |
|---|---|
| 97010-97028 | Untimed modalities such as hot and cold packs, electrical stimulation and ultrasound, billed once per visit; some are bundled or not separately paid by some payers |
| 97110, 97112, 97116, 97140, 97530 | Timed treatment codes billed in 15-minute units, covering therapeutic exercise, neuromuscular re-education, gait training, manual therapy and therapeutic activities |
| 97161-97164 | PT evaluations at three complexity levels and the re-evaluation; the level depends on the documented history, examination and decision making, not on the time spent |
| 97750, 97535, 97760-97763 | Tests and measurements, self-care and home management training, and orthotic or prosthetic management, each with its own unit and documentation rules |
| G0283 | Unattended electrical stimulation for Medicare, used in place of the CPT code Medicare does not accept for that service |
Modifiers that matter
- GP
- Required on every service delivered under a physical therapy plan of care for Medicare and many other payers. A missing GP is a rejection before adjudication, not a denial you can appeal.
- KX
- Added once the patient's therapy spending passes the annual threshold CMS publishes, attesting that continued care is medically necessary and the documentation supports it.
- CQ
- Appended when a physical therapist assistant furnished the service in whole or in part. Medicare pays those services at a reduced rate, with a small-involvement exception.
- 59 and the X modifiers
- Used when two timed codes that NCCI pairs, such as manual therapy with therapeutic activities, were delivered as distinct services in separate time blocks. XU or XS is preferred by payers that accept them.
Payers
Payer notes
- MedicareOutpatient therapy must be furnished under a plan of care certified by a physician or non-physician practitioner and recertified on the interval CMS sets, and timed codes are counted by total timed minutes under the unit rules in the claims manual.2
- MedicareThe KX modifier is required on claims once the patient's spending passes the annual threshold CMS publishes for physical therapy and speech-language pathology combined, and services furnished in whole or in part by a physical therapist assistant carry the CQ modifier and are paid at a reduced rate.1
- MedicareMaintenance programs are covered only when the skills of a therapist are needed to carry them out safely and effectively; routine maintenance exercise that the patient or a caregiver can perform is not covered.3
- Commercial plansMost apply the NCCI procedure-to-procedure edits and medically unlikely edits, so paired timed codes need a distinct-service modifier with documentation to match, and each code has a daily unit ceiling.4
Authorizations
Medicare does not require prior authorization for outpatient physical therapy, but it requires a certified plan of care and the KX attestation once spending passes the threshold. Most commercial plans and Medicaid managed care plans require authorization either from the first visit or after an initial allowance, measured in visits and dates. Your biller records the authorized visits and end date on the schedule, counts down as visits are booked, and requests renewal before the last authorized visit, with the updated plan of care attached.
Documentation traps
- Total timed minutes not recorded, so the unit count cannot be defended; start and stop times or total minutes per timed code are the fix
- Progress notes missing at the payer's interval, which turns a covered episode into a medical necessity denial at the next review
- Maintenance exercise documented as skilled therapy; the note has to show why a therapist's skills were needed that day
- Plan of care certification signed late or not at all; claims billed before certification are at risk of recoupment
What a specialist checks
Specialist or generalist for physical therapy billing?
A generalist biller can enter a physical therapy claim. Whether it pays turns on three things specific to physical therapy billing, and a specialty-aware biller checks each one.
Code families
Each family billed with what the chart has to show for it.
- 97010-97028
- 97110, 97112, 97116, 97140, 97530
- 97161-97164
Modifiers
Applied only where the note supports them, line by line.
- GP
- KX
- CQ
If you are moving from another billing company or an in-house biller, switching billing companies follows a plan: the old and new processes run side by side until the new one is proven, and every login and every physical therapy claim stays in your name.
What we handle
What we handle for physical therapy practices
- Medical codingCPT, ICD-10 and modifiers assigned correctly
- Charge entryEvery encounter captured, nothing left unbilled
- Claim submissionScrubbed, submitted and tracked to acceptance
- Denial managementEvery denial read, worked and appealed
- Prior authorizationAuths requested, tracked, attached to claims
- Eligibility verificationCoverage and benefits checked before visits
A dedicated biller with named cover, working inside your system and reporting to you on one written page. How it works sets out the five stages.
Software
Systems physical therapy practices usually run
Your biller works inside your system as a user you create. All the systems we work in.
Questions
Questions about physical therapy billing
How does the 8-minute rule work?
What is the KX modifier and when do we add it?
Are services by a physical therapist assistant paid the same?
Why was the evaluation denied when billed with treatment on the same day?
Can we bill maintenance therapy?
What do you need from a PT clinic to start?
Next step
See where your physical therapy claims are getting stuck.
Three quick questions. No patient data. A billing specialist reads every request and replies in writing.
- Three questions, about two minutes
- No patient data, no software to buy
- A written reply from a biller, not a sales deck
You answer three questions
A billing specialist reads them
A written reply by email
Prefer email? sales@remitwright.com
Request received
Thanks. Your review request is in.
Reference . Quote it if you write to us about this request.
- A billing specialist reads your answers and replies by email.
- If a look at real claims makes sense, we agree read-only access under a BAA first.
- You get a written summary of what is worth working and what it would take. No commitment.
While you wait: see the sample weekly report or read how switching works. You can also download the sample weekly report (PDF).