Physical Therapy Medicare Audits and the Therapy Threshold

A physical therapy practice billing Medicare beyond the annual per-beneficiary threshold steps directly into the government's highest-scrutiny audit lane. For calendar year 2026, the KX modifier threshold for physical therapy and speech-language pathology services combined is $2,480, and claims that cross a second, higher amount face a real chance of manual medical review. The stakes run past paperwork. A Medicare Administrative Contractor, a Recovery Audit Contractor, or a Supplemental Medical Review Contractor that finds a documentation gap in a sample of claims can extrapolate that error rate across the full claim universe and demand recoupment running into six figures.

The CY 2026 KX Modifier and Medical Review Thresholds

Section 50202 of the Bipartisan Budget Act of 2018 repealed the hard dollar caps on outpatient therapy and replaced them with two per-beneficiary thresholds under Section 1833(g)(7) of the Social Security Act. The first is the KX modifier threshold: $2,480 for physical therapy and speech-language pathology combined, and a separate $2,480 for occupational therapy, for calendar year 2026, per CMS Transmittal 13437 and Change Request 14252, effective January 1, 2026. Claims submitted above that amount without the KX modifier are denied outright. The second is the targeted medical review threshold, set at $3,000 through calendar year 2028. That figure places a claim inside the range CMS uses for Targeted Probe and Educate selection and for the documentation-driven review that a Recovery Audit Contractor or Supplemental Medical Review Contractor is built to run. Practices billing near either number should confirm exactly what their local coverage determination requires the medical record to show.

Maintenance Therapy Under the Jimmo Standard

Medicare coverage of skilled therapy turns on the beneficiary's need for skilled care, not on whether the patient is expected to improve. The Jimmo v. Sebelius settlement, approved by the federal district court on January 24, 2013, confirmed that skilled therapy is covered when a therapist's clinical judgment is needed to maintain a patient's current function or to slow or prevent decline. CMS built that standard into the Medicare Benefit Policy Manual, Chapter 15. The audit risk lives in the gap between that legal standard and the documentation on file: a maintenance program holds up only when the record shows why a skilled therapist, rather than a caregiver or a home exercise program, was necessary to perform it safely and effectively.

A maintenance plan of care without an individualized justification for skilled intervention reads as custodial care, and Medicare does not pay for custodial care.

Treatment Note and Progress Report Quality

Most therapy audit findings turn on whether the note proves medical necessity, not on whether the treatment itself was reasonable. The Medicare Benefit Policy Manual requires an initial evaluation, a physician-certified plan of care, and a progress report at least once every ten treatment days or thirty calendar days, whichever is shorter, tying objective, measurable functional outcomes to the billed codes. A physician or non-physician practitioner must certify the plan of care within 30 days of the initial treatment and recertify it periodically thereafter. CERT audits have repeatedly flagged outpatient therapy claims for exactly these gaps. Templated notes that restate the plan of care instead of the day's actual functional findings, missing recertification signatures, and units billed without contemporaneous time documentation are the specific defects that turn a routine additional documentation request into an extrapolated overpayment demand.

Why Early Legal Counsel Is Critical

It is critical that physical therapy practices promptly retain experienced healthcare defense counsel upon receiving a Medicare additional documentation request, a Targeted Probe and Educate notice, or any other audit inquiry tied to the therapy threshold. Early legal intervention can shape how the practice responds to the contractor's request, correct documentation gaps before they harden into an extrapolated overpayment demand, and preserve the practice's appeal rights at every level. Delaying legal representation can significantly affect the outcome of the audit and expose the practice to recoupment it could otherwise have avoided.

How Health Law Alliance Can Help

Health Law Alliance defends physical therapy practices and other Medicare providers through every stage of a therapy threshold audit, from the initial additional documentation request through Targeted Probe and Educate review and formal appeal. Our bench evaluates a contractor's extrapolation methodology and documentation findings before the practice responds, ahead of the recoupment demand rather than after it. If your practice is facing a Medicare audit tied to therapy claims, contact us for a free, confidential consultation.