Physical Therapy Billing Denials: What Is Generating the Claims and How to Stop Them in 2026
Physical therapy billing denials in 2026 are not generated by clinical failures. They are generated by a unit count that does not match the documented session minutes, a note that describes symptoms instead of functional deficits, a GP modifier omitted from a claim before it reaches a reviewer, and a Medicare Advantage authorization that expired three days before the last session of a treatment block. This article maps each denial vector, what it costs per month at full patient volume, and what audit-ready PT billing actually requires before a claim leaves your practice.