CPT code 97171 defines a high-complexity physical therapy evaluation for patients with three or more health-related issues and an unstable or unpredictable clinical presentation that impacts physical activity. It specifies use of a standardized assessment instrument and/or functional outcome tool, examination of the affected body area, and documentation of four or more elements related to symptoms, body structure, activities, or participation. The service typically requires 45 minutes of face-to-face time.

This code matters nationally because it captures complexity in functional assessments and supports appropriate resource allocation for intensive evaluation. Major payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will learn how the code is defined clinically and administratively, common payer acceptance and coverage patterns, relevant billing and documentation expectations, and common modifiers applied in practice. The publication also summarizes benchmarking considerations and clinical context relevant to musculoskeletal and athletic injury evaluations.

The article provides concise guidance on coding intent, documentation elements that justify high-complexity evaluation, and what to expect across public and commercial payers. Data not available in the input is explicitly noted where applicable in detailed sections.