CPT code 66850 denotes surgical cataract extraction performed by mechanically or ultrasonically fragmenting the lens and aspirating the material. This microsurgical procedure is a common ophthalmic operation addressing vision‑obscuring lens opacities and is central to outpatient eye surgery volumes nationwide. The code is relevant to surgeons, ambulatory surgery centers, hospital outpatient departments, and payer medical policy teams because it captures a routine yet resource‑intensive procedure that affects utilization, device supply, and reimbursement workflows.

Key payers addressed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise clinical description and typical site‑of‑service context, plus an overview of common modifiers and coding considerations provided in the supporting sections. The publication summarizes national benchmarks and payer coverage patterns where available, clarifies coding intent and relationships to related ophthalmic procedures, and highlights policy updates and documentation elements that commonly affect claim adjudication. The material is written for clinicians, billing specialists, and policy analysts looking for a clear reference on how CPT code 66850 is used and interpreted across settings.