CPT code 26863 denotes an add-on surgical service for fusion of an additional interphalangeal joint of the finger performed at the same session as a primary interphalangeal arthrodesis. This code captures the incremental work associated with immobilizing and inducing bone generation in a second finger joint, often using internal fixation and an autologous bone graft. Nationally, the code matters for accurate surgical reporting, resource accounting, and payment for multi-joint hand procedures.

Key payers addressed in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The content clarifies clinical context for hand and upper-extremity surgeons and coding professionals, and summarizes the environments where the procedure is typically performed.

Readers will find benchmarks and interpretive guidance relevant to coding and billing workflows, a concise clinical description of the service, and pointers to payer coverage considerations and common modifier usage (when available). The publication also outlines operative setting expectations and the clinical rationale for using an add-on code when multiple interphalangeal joints are fused in one operative session. Data not available in the input is noted where applicable.