CPT code 66180 denotes the surgical implantation of a glaucoma drainage device (shunt) in the anterior chamber with graft reinforcement to secure the plate. This procedure addresses refractory glaucoma when conventional medical or surgical therapies have failed, and carries national clinical relevance due to the increasing prevalence of advanced glaucoma and the need for procedures that control intraocular pressure to prevent vision loss. Payers commonly covering this service include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.

Readers will find a concise account of what CPT code 66180 represents, the clinical context for its use in treating refractory glaucoma, and the typical settings where the procedure is performed (hospital outpatient departments and ambulatory surgical centers). The publication provides benchmarks and coverage patterns for major national payers, summarizes policy and prior authorization trends affecting access to drainage device implantation, and outlines coding and billing considerations relevant to surgical ophthalmology service lines. The content is intended for clinical coders, revenue cycle managers, and policy analysts seeking a national overview of utilization drivers, payer considerations, and the clinical circumstances that prompt use of CPT code 66180. Data not available in the input will be noted where applicable.