CPT 35533 Axillofemoral Bypass Reimbursement | OpenPayer

Summary & Overview

CPT 35533: Axillofemoral Bypass Using Vein Graft, Bilateral

CPT code 35533 denotes an axillofemoral bypass using a vein graft to connect the axillary artery to bilateral femoral artery segments. This complex vascular surgery is used to bypass obstructive disease when direct aortoiliac reconstruction is unsuitable, and it has implications for surgical planning, resource utilization, and postoperative vascular surveillance across the U.S. health system. Nationally, the code represents a high-acuity operative intervention with associated inpatient resource needs and specialized surgical skillsets.

Key payers addressed in this publication include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the clinical context for CPT code 35533, an overview of typical sites of service and service type, and the common modifiers that may accompany billing for documentation and adjudication. The report outlines typical billing considerations and what information payers and providers often review during claims processing. It also points to areas where policy and coverage determinations commonly affect authorization and reimbursement workflows. Data not available in the input is noted where applicable.

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Billing Code Overview

CPT code 35533 describes a surgical bypass procedure in which the provider creates an axillofemoral bypass using a vein graft to connect the axillary artery to portions of the femoral arteries on both sides. This procedure is a form of extra-anatomic arterial bypass intended to reestablish blood flow to the lower extremities when direct aortic or iliac reconstruction is not feasible.

Service type: Surgical vascular bypass procedure
Typical site of service: Hospital operating room or vascular surgery suite

Clinical & Coding Specifications

Clinical Context

A typical patient is a 65-year-old with progressive bilateral lower extremity claudication and rest pain due to multilevel peripheral arterial occlusive disease involving the iliac and femoral segments. Noninvasive vascular testing (duplex ultrasound, CT angiography, or MR angiography) demonstrates significant bilateral femoral artery inflow obstruction not amenable to endovascular repair alone. The vascular surgeon plans an axillofemoral bypass using autogenous or prosthetic conduit to re-establish inflow to both femoral arteries. Preoperative workflow includes vascular lab studies, cardiopulmonary risk assessment, informed consent discussing risks (bleeding, infection, graft thrombosis), and marking of axillary and femoral incision sites. Intraoperative steps include induction of anesthesia, exposure of the axillary artery, tunneling of a graft subcutaneously to the groin(s), creation of femoral anastomoses on each side, confirmation of distal pulses and graft patency (Doppler/angiography), and hemostasis. Typical postoperative care involves monitoring vascular status, anticoagulation or antiplatelet management, wound care, and surveillance duplex ultrasound before discharge and at follow-up.

Coding Specifications

Modifier	Description	When to Use
`00`	No modifier—default	Use when no other modifier applies to the service.

CPT 35539: Aorto-Femoral Vein Bypass Graft

CPT-35570-TIBIAL-PERONEAL-ARTERY-BYPASS

CPT 35570: Tibial and Peroneal Artery Bypass Procedures

CPT-35572-FEMOROPOPLITEAL-VEIN-HARVEST-FOR-VASCULAR-RECONSTRUCTION

CPT 35572: Femoropopliteal Vein Harvest for Vascular Reconstruction

CPT-35566-FEMORAL-TO-TIBIAL-PERONEAL-BYPASS

CPT 35566: Femoral-to-Tibial/Peroneal Arterial Bypass

CPT-35515-SUBCLAVIAN-TO-VERTEBRAL-ARTERY-BYPASS-VEIN-GRAFT

CPT 35515: Subclavian-to-Vertebral Artery Bypass with Vein Graft

CPT-35521-AXILLARY-TO-FEMORAL-VEIN-BYPASS

CPT 35521: Axillary-to-Femoral Vein Bypass

CPT-35511-SUBCLAVIAN-ARTERY-TO-SUBCLAVIAN-ARTERY-VEIN-BYPASS

CPT 35511: Subclavian-to-Subclavian Vein Bypass Graft

CPT-35540-AORTO-BIFEMORAL-VEIN-BYPASS-GRAFT

CPT 35540: Aorto‑bifemoral Vein Bypass Graft

CPT-35518-AXILLARY-ARTERY-TO-AXILLARY-ARTERY-BYPASS-VEIN-GRAFT

CPT 35518: Axillary-to-Axillary Artery Bypass with Vein Graft

CPT-35563-ILIAC-ARTERY-TO-ILIAC-ARTERY-VEIN-BYPASS

CPT 35563: Iliac-to-Iliac Artery Bypass with Vein Graft

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Taxonomy Code	Specialty	Notes
208C00000X	Vascular Surgery	Primary specialty performing axillofemoral bypass procedures.
207L00000X	Thoracic and Cardiac Surgery	May perform peripheral bypass in hybrid or complex arterial disease cases.
207R00000X	General Surgery	General surgeons with vascular training may perform this procedure.
207K00000X	Surgery of the Peripheral Vascular System	Providers specializing in peripheral vascular interventions and open bypass surgery.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`I70.213`	Atherosclerosis of native arteries of the extremities with intermittent claudication, bilateral legs	Common indication when multilevel atherosclerotic disease causes lifestyle-limiting claudication bilaterally necessitating axillofemoral bypass.
`I70.234`	Atherosclerosis of native arteries of the extremities with ulceration, bilateral legs	Indicates tissue loss or ulceration from critical limb ischemia motivating revascularization.
`I70.241`	Atherosclerosis of native arteries of the right leg with rest pain	Rest pain reflects severe ischemia and is a standard indication for surgical bypass.
`I70.242`	Atherosclerosis of native arteries of the left leg with rest pain	As above, specifying laterality.
`I74.3`	Embolism and thrombosis of arteries of lower extremities	Acute or subacute embolic/thrombotic events may prompt bypass when endovascular options are unsuitable.
`I70.70`	Atherosclerosis of unspecified type of the extremities, unspecified extremity	Used when documentation lacks laterality but severe peripheral arterial disease is present.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`34802`	Operative exposure of axillary artery	May be performed immediately prior to creation of axillofemoral bypass conduit to gain arterial access.
`35566`	Extra-anatomic bypass, femoral to femoral or axillofemoral, with prosthetic graft, single segment	Related extra-anatomic bypass codes; used when prosthetic conduit or single-segment techniques are specified.
`36147`	Introduction of catheter with radiological supervision for intraoperative angiography	May be used intraoperatively to confirm graft patency and distal runoff via angiography.
`93925`	Duplex scan of extremity arteries, complete bilateral study	Commonly used for preoperative and postoperative surveillance of graft patency.
`99223`	Initial hospital inpatient care, high complexity	Typical reporting for the admitting physician managing a complex surgical patient postoperatively.

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