Summary & Overview
CPT 37606: Ligation of Internal or Common Carotid Artery
CPT code 37606 denotes surgical ligation of the internal or common carotid artery via a neck incision using a gradual occluding clamp. It is most often used in the management of carotid artery aneurysms or traumatic vascular injuries that require definitive vascular control. Nationally, this code represents a high-acuity vascular surgery procedure with implications for acute care reimbursement, hospital resource utilization, and coding compliance.
Key payers in typical coverage discussions include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise clinical context for the procedure, typical sites of service, and the common payer landscape. The publication also outlines expected benchmarks and billing considerations, including common modifiers and related coding practices where available.
This summary equips clinical coders, revenue integrity teams, and policy analysts with the essential context needed to understand when CPT code 37606 applies, how it fits into surgical vascular care, and which national payers are commonly engaged in coverage and payment decisions. Data not available in the input is identified where necessary.
Billing Code Overview
CPT code 37606 describes a surgical procedure in which the provider makes an incision in the neck to locate the internal or common carotid artery and ligates it using a gradual occluding clamp. This procedure is most commonly performed to treat an internal or common carotid artery aneurysm or injury.
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Service type: Surgical vascular procedure
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Typical site of service: Hospital operating room or surgical suite (inpatient or outpatient hospital setting)
Clinical & Coding Specifications
Clinical Context
A 62-year-old male presents with a pulsatile neck mass and progressive cranial nerve deficits after a recent traumatic neck injury. Imaging with CT angiography demonstrates a saccular aneurysm of the proximal internal carotid artery with risk of rupture and local neurovascular compromise. Vascular surgery schedules an open carotid artery ligation procedure when endovascular repair is unsuitable due to vessel anatomy and distal involvement.
Preoperative workflow includes informed consent, airway assessment, cross-matched blood availability, and cerebral ischemia risk evaluation. In the operating room under general anesthesia, the surgeon makes a transverse or vertical cervical incision to expose the common and internal carotid arteries, places proximal and distal controls, and applies a gradual occluding clamp before ligating the internal or common carotid artery. Intraoperative neuromonitoring (when available) and shunting decisions are based on collateral circulation and cerebral perfusion monitoring. Postoperative care involves neurologic observation in a monitored setting, blood pressure management, wound care, and follow-up vascular imaging to document exclusion of the aneurysm or control of hemorrhage.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
11 | Principal procedure | When 37606 is the primary service performed during the encounter |