CPT code 27626 identifies an open surgical excision of a diseased ankle tendon sheath with removal of the synovial membrane, used for both diagnosis and treatment of tenosynovial conditions. This procedure is relevant nationally for orthopedic surgery, podiatry, and specialty surgical practices managing inflammatory or degenerative tendon sheath disorders of the ankle. Payers commonly involved in coverage decisions include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.

Readers will find a concise clinical description, typical sites of service, and the policy and billing considerations that affect coding and reimbursement for this operative service. The publication summarizes common modifiers and payer considerations, highlights where guidance is often needed for documentation and medical necessity, and provides clinical context that clarifies when an open tendon sheath excision and synovectomy is performed versus alternative, less invasive interventions. Data not available in the input is noted where applicable.