CPT code 21120 identifies surgical augmentation of a receding chin with a chin implant during a genioplasty. This code captures procedures performed for cosmetic enhancement as well as for medically necessary corrections of occlusion and bite-related functional deficits. Nationally, chin augmentation is a commonly reported facial plastic procedure with relevance for surgical practice patterns, coverage policy, and facility utilization.

Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare and Medicare. Readers will find a concise overview of clinical intent and typical sites of service, a summary of payer coverage considerations, and context for benchmarking utilization and compliance. The publication highlights common billing and documentation themes relevant to cosmetic versus reconstructive indications, and it outlines the types of benchmarks and policy updates that influence payment and prior authorization practices.

This analysis is intended for national audiences including surgical practices, coding and billing teams, and payer policy analysts. It provides clinical context for correct code usage, an outline of payer landscape, and pointers to the kinds of benchmarks and policy changes that affect prior authorization, coverage determinations, and facility billing for chin implant genioplasty procedures.