CPT code 66600 represents surgical excision of an iris lesion with removal of part of the iris and potential excision of adjacent corneal or scleral tissue. This anterior segment ophthalmic procedure is used to treat suspicious or symptomatic iris lesions and has implications for procedural coding, payer coverage, and perioperative resource planning nationwide. The code matters nationally because it defines a discrete surgical service that affects facility utilization, surgeon billing, and specialty-specific payment policies.

Key payers included in the analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the clinical context for the procedure, typical sites of service such as hospital operating rooms and ambulatory surgical centers, and which payers commonly cover such services. The publication outlines what stakeholders can expect to learn: national billing benchmarks where available, relevant policy considerations for coverage and prior authorization, and clinical context tying the code to anterior segment ophthalmic surgery. Data not available in the input is noted where applicable, including specific diagnosis pairings and payer-specific reimbursement rates. The content is intended for coders, billing managers, clinical leaders, and policy analysts seeking a clear national summary of CPT code 66600 and its role in ophthalmic surgical care.