Every PT has had this happen. The patient improved, the plan was sound and the visits were medically necessary, and the claim still came back denied or was pulled in an audit months later. When you trace it back, the cause is usually small: a plan of care that was never signed, a progress report that came a visit too late, or a note that described exercises without showing why a therapist was needed to deliver them.
The rules below come from Medicare's own guidance, the Medicare Benefit Policy Manual, Chapter 15, Section 220, which covers outpatient therapy. Many commercial and Medicare Advantage plans use similar standards, but always check each payer's policy. Whether you are a staff PT, a PTA or the owner signing the checks, these seven habits will protect your claims.
1. Treat plan of care certification like a deadline, because it is
For Medicare patients, the physician or nonphysician practitioner (NPP) must certify the plan of care. CMS says certification should happen "as soon as possible," which means within 30 days of the initial therapy treatment. If the certification is a verbal order, it must be followed by a signature within 14 days, with a dated note of the verbal order in the record (CMS Chapter 15, §220.1.3).
CMS also notes that payment may be denied if the plan isn't certified, and that a contractor may consider evidence that you tried to get the plan to the physician quickly.
The habit: Send the plan to the referring provider the day you write it. Keep a simple tracker of plans sent, follow-ups made and signatures received. Then document each follow-up attempt, because that record of diligence can matter in a review.
2. Know your recertification dates
A certified plan of care covers no more than 90 calendar days from the initial treatment. If care goes beyond the duration in the plan, or beyond 90 days, you need a recertification (CMS Chapter 15, §220.1.3). Significant changes to the plan, such as new long-term goals, also need recertification.
The habit: Put the plan's end date in the scheduling system, not just in the note. Have the front desk flag the visit two weeks before it so recertification never sneaks up on you.
3. Write progress reports at least every 10 treatment days
Under Medicare, a progress report is required at least once every 10 treatment days. The first reporting period starts on the first day of the episode, even if that day is only the evaluation. A clinician may write a report earlier, which resets the count (CMS Chapter 15, §220.3).
For PTAs: CMS allows assistants to write elements of the progress report between clinician reports. However, a report written by an assistant does not satisfy the required progress report. The supervising PT must write that one (CMS Chapter 15, §220.3).
The habit: Count treatment days, not calendar weeks. Many EMRs can flag visit 8 or 9 so the PT can schedule the progress report into a visit rather than scrambling for it afterward.
4. Show the skill, not just the exercise
The most common weak note reads like a gym log: "Bridges 3x10, clamshells 3x15, TheraBand rows." That tells a reviewer what happened. It does not tell them why a licensed therapist was needed.
The habit: For each intervention, add one line of clinical reasoning:
- What you assessed: "Pelvic drop noted on L in single-leg stance."
- What you changed: "Progressed to unilateral bridges with tactile cueing for glute activation."
- How the patient responded: "Able to hold neutral pelvis 8 of 10 reps after cueing."
- Why it matters: "Addresses functional goal of stair climbing without rail."
That is the difference between "exercise" and "skilled therapy."
5. Tie every goal to function
"Increase knee flexion ROM" is a measurement. "Increase knee flexion to allow a reciprocal stair pattern for entering the patient's home" is a goal a reviewer can connect to medical necessity. Function-based goals also make progress reports far easier to write, because you are tracking something the patient and the payer both care about.
The habit: For every impairment goal, ask, "So the patient can do what?" Then write that down.
6. Keep your minutes clean and consistent
Timed codes are only as defensible as the minutes behind them. CMS also states that evaluation time cannot also be billed as treatment time. Evaluation minutes are untimed and must not be counted in the minutes for timed codes (CMS Chapter 15, §220.3).
The habit: Record total treatment minutes and total timed-code minutes on every note, and make sure the units billed match. Watch for templates that auto-fill identical minutes every visit, because reviewers notice that pattern.
7. Close the loop between the front desk and the treatment room
Many denials start before the patient ever reaches the table: an expired authorization, the wrong payer on file, a missing referral or a visit cap no one tracked. Clinicians can't fix all of that, but owners can build a system that catches it.
For clinic owners:
- Run a weekly audit of a few charts per clinician, checking certification, progress-report timing and skilled-care language. Use it as coaching, not discipline.
- Track denials by reason code so you can see whether the problem is front-end (eligibility, authorization) or documentation.
- Protect documentation time in the schedule. Rushed notes are where most of these habits break down.
The bottom line
Good documentation isn't extra work layered on top of patient care. It is the record that proves the care happened and was worth paying for. Certify fast, count your treatment days, show your clinical reasoning and keep your minutes honest. Your claims, and your evenings, will thank you.
This article is general information, not legal or billing advice. Payer rules change, so confirm current requirements with CMS, your Medicare Administrative Contractor and each commercial payer.