Regulatory framework
Physical therapy practices operate under HIPAA as covered entities through standard electronic transactions — claims submission to Medicare Part B, private payers, workers' compensation systems, and eligibility verification. Medicare therapy services impose specific documentation requirements: plan of care signed by referring physician within 30 days, periodic reassessment, KX modifier and therapy-cap exception documentation, progress-note specificity. State physical therapy practice acts govern record-keeping. The ABPTS specialty board rules apply where the practice employs specialty-certified clinicians.

