Why PT superbills get a closer look
Physical therapy claims are counted in units, and units are where reviewers focus. A PT superbill that just says “therapy, 4 units” gives an insurer nothing to work with. One that lists each code on its own line, with the right units, the GP modifier and a diagnosis that matches the plan of care, usually moves through out-of-network processing without a request for records.
The plan will also look for your credentials and license, an individual NPI, a Tax ID, and the patient’s insurance details. For many plans, a referral or physician-certified plan of care on file matters as much as the superbill itself.
Physical therapy codes at a glance
| Code | When to use it |
|---|---|
| 97161 / 97162 / 97163 | Initial evaluation, chosen by complexity: history, body systems examined, how stable the presentation is, and decision making |
| 97164 | Formal re-evaluation when the patient’s status changes or the plan of care needs revising |
| 97110 | Exercise for strength, range of motion, endurance or flexibility |
| 97112 | Balance, coordination, posture and proprioception retraining |
| 97116 | Gait training, including stair training |
| 97140 | Joint mobilization, soft tissue mobilization, manual traction, manual lymphatic drainage |
| 97530 | Dynamic functional activities such as lifting, transfers or sport-specific tasks |
| 97535 | Training in self-care, home safety, adaptive equipment or a home program |
| 97150 | Group treatment of two or more patients, one unit per patient |
| 97012 / 97014 | Mechanical traction or unattended e-stim, one unit per visit; Medicare uses G0283 instead of 97014 |
| 97035 | Ultrasound, in 15-minute units |
| 20560 / 20561 | Dry needling of one or two muscles, or three or more |
Evaluations are untimed and always billed as one unit, whatever the length. Most treatment codes are timed in 15-minute increments.
Counting units: the 8-minute rule and its alternatives
Medicare uses a total-time method, usually called the 8-minute rule. Add up the minutes of every timed, one-on-one service in the visit, then convert the total: 8 to 22 minutes is one unit, 23 to 37 is two, 38 to 52 is three, 53 to 67 is four, and each further 15 minutes adds one. Fewer than 8 timed minutes in total means no timed units. Assign full 15-minute blocks to each code first, then give any remaining units to the services with the most leftover minutes.
Take the visit 14 days ago in the sample: 33 minutes of therapeutic exercise and 7 minutes of manual therapy make 40 timed minutes, which is three units. Exercise gets two full units and has 3 minutes left over; manual therapy has 7. The third unit goes to 97140 because it has more leftover minutes, so the superbill shows 97110 with two units and 97140 with one.
Some commercial plans and Medicaid programs count each code on its own instead, giving a unit only when that code reaches 8 minutes. Under that method, the same visit would bill only 97110 for two units. Check which method the patient’s plan uses, and keep total timed minutes and total treatment minutes in your notes.
Modifiers and place of service
GP marks a service as part of a physical therapy plan of care. Medicare requires it on every therapy line, and many commercial plans expect it too, which is why the sample includes it on every line. KX and CQ are Medicare modifiers: KX shows therapy above the yearly threshold is medically necessary, and CQ flags services provided in whole or in part by a PT assistant. Use 59 or XS only when a payer bundles two services and they were truly separate. Clinic visits use POS 11; home visits use POS 12. For telehealth, follow the patient’s plan.
Cash-based PT and superbills
For a cash-based or out-of-network clinic, the superbill is how patients get some of their money back, so make it complete:
- Medicare is different. Physical therapists cannot opt out of Medicare, so check the rules before accepting cash from Medicare beneficiaries for covered services.
- Referrals and plans of care. Direct access laws let patients see a PT without a referral in most states, but a plan may still require one before it reimburses.
- Good Faith Estimates. Self-pay patients are generally entitled to a good faith estimate of expected charges before care begins.
- Dry needling. Coverage is inconsistent and many plans exclude it, and state scope-of-practice rules differ. Tell patients reimbursement is not assured.
- HSA and FSA. Many patients pay PT bills from a health account. The HSA and FSA superbill guide covers what administrators want.
How to fill this physical therapy superbill template
- Clinic and therapist. Enter the practice name, your name and credentials (PT, DPT), license number, address, phone, email, NPI and Tax ID. The NPI field validates the check digit.
- Patient. Add name, date of birth, address, insurance carrier, member ID and group number.
- Diagnoses. Enter the medical diagnosis first, then any treatment diagnoses such as muscle weakness or gait abnormality, up to 12 lettered A to L.
- One line per code per visit. Add the date, CPT code, GP modifier, POS, diagnosis pointer and units. Enter the fee per unit; the line total multiplies it out.
- Payment and signature. Enter the amount paid, type your signature, and review the checklist.
- Print or batch. Print / Save as PDF, or import a CSV from your EHR to print one superbill per patient in a single run. See the EHR CSV import guide.
Start your PT superbill
Load the sample above to see a finished physical therapy superbill, then replace it with your own clinic and patient details. Nothing leaves your browser. If you are explaining superbills to patients for the first time, share what is a superbill. Clinics with mixed disciplines can use the occupational therapy and chiropractic templates.