CPT code 26100 denotes a surgical biopsy of the carpometacarpal joint where an incision is made to access the joint and soft tissue is sampled. This procedure is relevant for diagnosing joint and periarticular conditions of the wrist and is performed in operative settings. Nationally, accurate coding of this procedure affects claims processing, clinical documentation, and fee schedules for surgical hand and wrist services.

Key payers covered in the analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of clinical context for the procedure, common care settings, and the types of benchmarks and policy topics typically associated with surgical biopsy codes (e.g., site-of-service considerations, documentation requirements, and reimbursement policy updates). The publication also outlines common modifiers associated with billing this service and notes when additional coding or clinical detail may be required.

This summary is intended to orient clinicians, coding professionals, and policy analysts to the clinical purpose of CPT code 26100, the typical care environments where it is performed, and the payer landscape that shapes coverage and payment policies.