CPT code 20956 denotes a surgical microvascular procedure in which bone graft material is harvested from the hip with its vascular supply and reconnected at the recipient site using an operative microscope. This technique — often described as a vascularized iliac crest bone graft — is used to promote faster and more reliable healing where bone is missing or damaged from trauma, infection, tumor resection, or other pathology. Nationally, the code is relevant for complex reconstructive orthopedics, plastic surgery, and maxillofacial procedures that require living bone transfer and microsurgical expertise.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context, expected site-of-service settings, and the service type tied to this code. The publication summarizes common billing considerations, typical utilization patterns, and where CPT code 20956 fits within reconstructive and orthopedic surgical coding frameworks. It also highlights benchmarks and policy updates where available and notes where input data was not provided. The goal is to give clinicians, coding professionals, and policy analysts a clear, national-level reference for the clinical intent and billing context of CPT code 20956.