CPT code 31255 represents an anterior and posterior ethmoidectomy — endoscopic surgical removal of ethmoid sinus cells involving both the anterior and posterior compartments. This sinus surgery code is used for procedures addressing widespread ethmoid sinus disease, commonly performed to treat chronic or recurrent sinusitis that compromises drainage and ventilation. Nationally, accurate coding for ethmoidectomy is important for clinical documentation, surgical quality tracking, and payer adjudication of otolaryngology services.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The coverage landscape for endoscopic sinus procedures typically hinges on documented medical necessity, prior conservative therapy, and clear operative reports describing the anatomic extent addressed.

Readers will find an overview of the clinical context for anterior and posterior ethmoidectomy, common sites of service where the procedure is performed, and the payer mix addressed. The publication summarizes benchmarks and policy considerations relevant to reimbursement and authorization practices for surgical sinus procedures, highlights documentation elements that commonly affect coverage decisions, and provides a concise reference for coding and billing teams. Data not available in the input is noted where specific payer policies, associated taxonomies, and ICD-10 diagnosis mappings are not supplied.