CPT code 37600 covers open surgical ligation of the external carotid artery via a neck incision, most commonly performed for carotid artery aneurysm management. This code denotes a definitive vascular procedure that has implications for operative planning, facility resource use, and national surgical volumes for head and neck vascular interventions. It is pertinent for hospitals, independent surgical centers, and payers managing high-acuity vascular cases.

Key payers discussed in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare and Medicare. Readers will find a concise overview of the code’s clinical context, typical settings of care, and common billing considerations. The publication presents payment benchmarks and utilization patterns where available, summaries of relevant policy or coverage guidance that affect claim adjudication, and procedural coding considerations tied to operative documentation.

The report is intended to help billing managers, coders, and health policy analysts understand the clinical intent of CPT code 37600, compare coverage and payment approaches across major payers, and align documentation practices with coding requirements. Data not available in the input is noted when applicable.