CPT code 37605 denotes open surgical ligation of the internal or common carotid artery, a procedure most often used to manage carotid artery aneurysms. Nationally, this code represents a high-acuity vascular surgery with implications for inpatient surgical staffing, perioperative vascular care, and facility billing. Payers commonly engaged with this service include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.

Readers will gain a concise clinical framing of the procedure, an overview of payer coverage intent, and the context necessary for coding and billing decisions. The publication provides benchmarks and comparative perspectives on utilization and reimbursement trends, highlights policy developments affecting surgical vascular services, and clarifies clinical coding considerations tied to operative setting and service type. Where detailed payer-specific rates or contract terms are not provided, the report notes that data is not available in the input. This piece is intended for billing managers, vascular surgery teams, and revenue cycle professionals seeking a national-level summary of the code's clinical purpose and billing context.