CPT code 26841 represents surgical immobilization (arthrodesis) of the thumb carpometacarpal (CMC) joint, performed with or without internal fixation devices. This procedure stabilizes the joint between the thumb’s metacarpal and the trapezium bone to address instability, deformity, or advanced degenerative disease that impairs hand function. Nationally, coverage and coding practices for thumb CMC arthrodesis affect reimbursement patterns in hand surgery, orthopedics, and ambulatory surgical settings.

Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna, UnitedHealthcare, and Medicare. The publication outlines payer-specific coverage considerations, common modifiers encountered in claims, and where CPT code 26841 is typically billed (operating room or ambulatory surgery center).

Readers will find a concise clinical context for the procedure, coding and billing considerations, typical sites of service, and benchmarks relevant to utilization and reimbursement. The report also highlights common modifiers used with this service and notes when external fixation or implant use may be reported alongside the primary procedure code. Data not available in the input are identified where applicable.