CPT code 69505 denotes a modified radical mastoidectomy, an otologic surgical procedure that removes diseased mastoid air cells and portions of mastoid bone. Nationally, this code represents definitive surgical management for chronic mastoiditis, cholesteatoma, and other complications of middle ear disease; it carries implications for hospital and ambulatory surgery center case mix, resource utilization, and specialist surgical workflows. Key payers commonly involved in coverage and claims for this procedure include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.

Readers will find a concise overview of clinical context, coding definition, and typical sites of service; benchmarking and utilization patterns across major payers where available; and policy or billing considerations relevant to otologic surgery claims. The publication outlines common modifiers and claim-level elements used with this surgical code, discusses billing and documentation considerations, and summarizes what to expect in payer adjudication and payment pathways. This material is intended for clinicians, coding professionals, and policy analysts seeking clear, national-level context for CPT code 69505 and its role in surgical ear disease management.