Summary & Overview
CPT 37605: Ligation of Internal or Common Carotid Artery
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.
Billing Code Overview
CPT code 37605 describes an open surgical procedure in which the surgeon makes an incision in the neck to locate the internal or common carotid artery and ligates it with a suture or clip. This procedure is most commonly performed for treatment of a carotid artery aneurysm.
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Service type: Open vascular surgical ligation of the carotid artery
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Typical site of service: Hospital operating room or inpatient surgical suite
Clinical & Coding Specifications
Clinical Context
A 68-year-old male with a known symptomatic carotid artery aneurysm presents with neck pain and a pulsatile mass on the right side of the neck. Imaging (CTA of the neck) demonstrates a saccular aneurysm of the right internal carotid artery with risk for rupture and thromboembolic events. Vascular surgery evaluates the patient and recommends open surgical ligation of the affected carotid segment when endovascular repair is unsuitable due to anatomy. The patient is admitted to an inpatient tertiary care center. Preoperative workup includes vascular laboratory studies, cross-sectional imaging review, and anesthesia evaluation. In the operating room under general endotracheal anesthesia, the vascular surgeon makes a cervical incision, dissects to expose the common and internal carotid arteries, and places ligature(s) or vascular clips to occlude flow to the aneurysmal segment. Postoperative care includes neurovascular monitoring, blood pressure control, and imaging follow-up. Typical site of service: inpatient hospital operating room or ambulatory surgery center when clinically appropriate. Service type: open surgical vascular procedure of the neck targeting the internal or common carotid artery (ligation). Typical patient scenario: older adults with carotid aneurysm, carotid blowout risk, or uncontrollable hemorrhage where vessel sacrifice is required.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | Procedure performed at an off-campus outpatient provider-based department (no professional component) |