CPT code 21339 represents open reduction and external fixation for fractures of the nasal and ethmoid bones. This operative procedure involves a nasal incision to realign bony structures and the application of an external fixation device to stabilize the area while healing occurs. The code captures a surgically intensive, specialty-driven service that affects trauma, facial reconstructive, and otolaryngology care nationally.

Key payers included in the analysis are Aetna, Blue Cross Blue Shield, Cigna, UnitedHealthcare, and Medicare. Coverage and payment policy for this code influence access to operative management of complex midface fractures, hospital and ambulatory surgery center reimbursement, and surgeon billing practices.

Readers will find: an overview of the clinical context for treating nasal and ethmoid fractures; benchmarks for site-of-service use and typical surgical setting; common billing considerations and modifiers used with operative facial fracture codes; and relevant policy or reimbursement factors that shape utilization. Data not available in the input will be noted where applicable. The content is intended to inform coding, revenue cycle, and clinical teams about the role and billing context of CPT code 21339 across major national payers.