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2025 CPT code 35501

Bypass graft using a vein; common carotid artery to ipsilateral internal carotid artery.

Refer to the most current CPT manual and payer-specific guidelines for complete and accurate coding and billing for this procedure.CPT guidelines state that procurement of the saphenous vein graft is included in the description of the work for 35501-35587 and should not be reported as a separate service.

Modifiers may be applicable depending on the circumstances of the procedure and the payer's requirements.Examples might include 51 (multiple procedures), 59 (distinct procedural service), or others, if multiple procedures or services are performed during the same operative session. Always consult current modifier guidelines and payer instructions.

Medical necessity is established by the presence of symptomatic or asymptomatic significant carotid artery stenosis or occlusion, posing a substantial risk of stroke.The procedure is indicated to improve blood flow to the brain and reduce the risk of ischemic events. Documentation must support the clinical indication, severity of stenosis, and the patient's risk factors to justify medical necessity.

The clinical responsibility involves the surgeon performing the bypass graft procedure, including pre-operative planning, meticulous dissection of the neck region to expose the carotid arteries, harvesting of the vein graft (if autologous), precise anastomosis of the graft to the common and internal carotid arteries, hemostasis, and wound closure.Postoperative care, including monitoring and follow-up, are generally considered part of the global period but may have separate billing implications depending on the payer.

IMPORTANT:For harvesting of an upper extremity vein, use 35500 in addition to the bypass procedure. For harvesting of a femoropopliteal vein segment, use 35572 in addition to the bypass procedure.For autogenous composite graft of two segments from two distant locations, report 35682 in addition to the bypass procedure; for three or more segments, report 35683.For unlisted vascular procedures, use 37799.

In simple words: The doctor creates a detour around a blocked artery in your neck using a piece of vein taken from elsewhere in your body. This restores blood flow to your brain.

This CPT code 35501 describes a surgical procedure where a bypass graft, constructed from a vein, is used to reroute blood flow around a blockage in the carotid artery.The procedure involves connecting the common carotid artery to a segment of the internal carotid artery on the same side of the neck (ipsilateral). This restores blood flow to the brain by bypassing the obstructed area. The procurement of the saphenous vein graft is considered inclusive in this code and should not be billed separately.Additional procedures, such as harvesting of an upper or lower extremity vein, would require separate coding.

Example 1: A 65-year-old male presents with significant carotid artery stenosis causing transient ischemic attacks (TIAs).A carotid artery bypass graft is deemed necessary, using a vein graft from the leg, to improve blood flow to the brain and prevent stroke., A 72-year-old female with a history of hypertension and hyperlipidemia experiences a stroke caused by complete occlusion of the internal carotid artery. Following a thorough evaluation, a carotid bypass using an autologous vein graft is performed to restore cerebral blood flow., An 80-year-old male with critical carotid artery stenosis is considered a poor candidate for carotid endarterectomy due to multiple comorbidities and significant risk factors.A carotid artery bypass using a synthetic graft (if suitable) is performed to minimize the surgical risk and maintain blood supply to the brain.

** Always refer to the most up-to-date CPT manual, NCCI edits, and payer-specific guidelines for accurate coding and billing.The information provided here is for guidance only and should not be considered exhaustive.Improper coding can lead to claim denials.

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