CPT code 36475 denotes endovenous radiofrequency ablation of a diseased extremity vein, reported for the first vein treated. This minimally invasive, percutaneous procedure uses a radiofrequency probe to thermally destroy the venous wall and close the vein, commonly employed for symptomatic varicose or refluxing superficial veins. Nationally, the code is significant for vascular surgery, interventional radiology and ambulatory surgery billing, shaping outpatient vascular care patterns and reimbursement discussions.

Key payers examined include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare and Medicare. These payers drive coverage criteria and preauthorization practices that affect utilization and site-of-service choices for endovenous ablation procedures.

Readers will find an overview of clinical context, typical sites of service, common billing modifiers, and payer coverage patterns. The publication summarizes benchmarks and policy considerations relevant to coding and claims submission for CPT code 36475, clarifies when this code is reported (first vein treated), and outlines the operational implications for outpatient vascular service lines. Data not available in the input will be noted where applicable.