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    OpenPayerBilling CodesVein Bypass Graft ProceduresCPT cpt-35510-carotid-to-brachial-artery-bypass-vein-graft
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    CPT 35510: Carotid-to-Brachial Vein Bypass Graft

    Medicare pays $1116 on average nationally for this procedure.

    CPT code 35510 describes surgical creation of a bypass graft that connects the carotid artery to a portion of the brachial artery using a vein graft to circumvent a vascular occlusion; this is a vascular bypass grafting procedure performed as an open surgical revascularization service, typically provided in an inpatient or vascular surgery operating room setting and billed as a major vascular operative service.

    For related coverage guidance, see recent payer policy updates: Automated Ambulatory Blood Pressure Monitoring for Diagnosis of Hypertension in Patients with Elevated Office Blood Pressure, Cardiology - Ivabradine, Cardiac Computed Tomography (CCT)/Coronary Computed Tomographic Angiography (CCTA).

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    Table of contents

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    Clinical & Coding Specifications

    Clinical Context

    A 72-year-old patient with progressive, symptomatic cerebrovascular insufficiency due to severe occlusive disease of the carotid artery presents with recurrent transient ischemic attacks and diminished cerebral perfusion on vascular imaging. Noninvasive testing (duplex ultrasound and CT angiography) demonstrates high-grade stenosis or occlusion of the carotid artery with inadequate collateral circulation. The vascular surgery team evaluates the patient and determines that direct carotid revascularization is not feasible or has failed; the decision is made to perform a carotid–brachial bypass using an autogenous vein graft to restore inflow to the ipsilateral upper extremity arterial circulation and augment cerebral perfusion.

    The clinical workflow includes preoperative vascular laboratory studies, cardiopulmonary risk assessment, informed consent, operative planning with selection of suitable vein conduit (typically greater saphenous vein), general anesthesia with intraoperative neuromonitoring as indicated, surgical exposure of the carotid artery and brachial artery, harvesting and preparation of the vein graft, anastomosis creation to bypass the carotid lesion, hemostasis, wound closure, and postoperative monitoring in an intensive care or step-down setting with antiplatelet therapy and duplex surveillance prior to discharge. Typical site of service is an inpatient hospital operating room; this is a major vascular reconstructive procedure requiring hospitalization and postoperative monitoring.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    35512Bypass graft, with vein; axillary artery to femoral artery (or vice versa) — example peripheral arterial bypass codesRelated large-vessel bypass codes used in peripheral arterial reconstruction; conceptually similar conduit harvesting and anastomosis techniques.
    34410Transposition of cervical vessels; carotid arteryPerformed when alternative carotid reconstruction or transposition is considered instead of a bypass.
    35563Revision or repair of vascular graft; major peripheral arteriesUsed when postoperative graft revision or thrombectomy is required for the carotid–brachial bypass graft.
    37607Vein harvest, open, for autogenous graft (saphenous vein), unilateralOften billed when a separate vein-harvest site is documented for the autogenous conduit used in bypass.
    36215Selective catheter placement, arterial system; each first order thoracic arch branch, with angiographyPreoperative or intraoperative diagnostic angiography to map arterial inflow/outflow prior to bypass.

    Related Modifiers

    11 rows

    ModifierDescriptionWhen to Use
    22Modifier –22 (Increased Procedural Services) is used when a reported procedure is substantially more extensive than normally required. The CPT Manual and CMS state it may be appended only when the…- When to use: Append modifier -22 to a procedural CPT code when the service performed is substantially more extensive than the usual service described by that code — i.e., the procedure required…
    26Modifier 26 (Professional Component) identifies and bills only the professional portion of a split service — the physician’s interpretation, report, and medical judgment — when the technical…- Use CPT Modifier -26 when you are billing only the professional component (PC) of a split‑bill eligible service—i.e., you performed the physician interpretation, medical judgment and prepared a…
    50Modifier –50 (Bilateral Procedure) is appended to a CPT code when an identical procedure is performed on paired anatomical structures during the same operative session. The AMA states to add…- Use modifier -50 when the same CPT surgical, diagnostic, or radiology procedure is performed on paired anatomical structures (both sides of the body) during the same operative/session by the same…
    52Modifier ‑52 (Reduced Services) indicates that a service or procedure was partially reduced or omitted at the provider’s discretion, allowing reporting of the basic procedure number with a qualifier…- Use modifier -52 when a physician or qualified health professional electively reduces or omits part of a procedure or service (for example, performing fewer required views or omitting a portion of…
    53Modifier 53 (Discontinued Procedure) signals that a surgical or diagnostic service was begun by the physician but terminated because of extenuating circumstances that threatened the patient’s…- Use modifier -53 when a physician/qualified healthcare professional has started a surgical or diagnostic procedure (e.g., anesthesia administered, incision or scope insertion) and then discontinues…
    62Modifier 62 indicates that two surgeons function as co‑surgeons, each performing distinct parts of the same primary surgical procedure. It is appended to the primary procedure code (and any…- Use modifier -62 when two surgeons act as co‑surgeons (both primary surgeons) on a single definitive primary procedure, each performing distinct parts of the same surgical procedure (append -62 to…
    66Modifier 66 (Surgical Team) is used when three or more surgeons act as primary surgeons on a single, highly complex procedure. The AMA defines it for use when a surgical team — often composed of…- Use modifier 66 when three or more surgeons act as primary surgeons working collaboratively as a surgical team on a single, highly complex or difficult procedure (for example organ…
    78CPT modifier -78 indicates an unplanned, related return to the operating or procedure room by the same provider during the global postoperative period. It is appended when treatment for a…- Use modifier -78 when an unplanned, related complication during the original procedure’s global postoperative period requires the patient to return to a formal operating or procedure room and the…
    80CPT® Modifier 80 (Assistant Surgeon) is appended to a surgical CPT code when a physician (MD or DO) provides full, continuous assistance throughout the operative procedure. It is intended only for…- Use CPT Modifier -80 when a physician (MD or DO) serves as an assistant surgeon and provides full, continuous assistance throughout the entire operative procedure; append -80 to the surgical CPT…
    81Modifier -81 indicates a physician served as a minimal assistant surgeon for part—not all—of an operative procedure. Use when a physician’s assisting role is limited and does not represent full…- Use CPT modifier -81 when a physician acts as a minimum assistant surgeon who assists during only part (a limited portion) of an operative procedure; append -81 to the primary surgical CPT code to…

    Showing 1–10 of 11

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    208000000X
    207P00000X
    207L00000X
    363L00000X
    246YC3301X
    207VM0101X
    261QA0005X
    1744R1103X

    Related ICD-10-CM Codes

    25 rows

    ICD-10-CM CodeDescription
    G45.1Carotid artery syndrome (hemispheric)
    G45.8Other transient cerebral ischemic attacks and related syndromes
    G45.9Transient cerebral ischemic attack, unspecified
    I63.50Cerebral infarction due to unspecified occlusion or stenosis of unspecified cerebral artery
    I63.511Cerebral infarction due to unspecified occlusion or stenosis of right middle cerebral artery
    I63.512Cerebral infarction due to unspecified occlusion or stenosis of left middle cerebral artery
    I63.9Cerebral infarction, unspecified
    I65.21Occlusion and stenosis of right carotid artery
    I65.22Occlusion and stenosis of left carotid artery
    I65.23Occlusion and stenosis of bilateral carotid arteries

    Showing 1–10 of 25

    Related Payer Policy Updates

    Specialty: Cardiology1 / 2

    10 rows

    PolicyPayerEffective Date
    Automated Ambulatory Blood Pressure Monitoring for Diagnosis of Hypertension in Patients with Elevated Office Blood PressureBluecross Idaho2026-11-01
    Cardiology - IvabradineCigna2026-10-15
    Cardiac Computed Tomography (CCT)/Coronary Computed Tomographic Angiography (CCTA)univerahealthcare2026-10-15
    Percutaneous Ventricular Assist DeviceUnitedHealthcare2026-10-01
    Cardiovascular Disease Risk AssessmentOscar Health2026-10-01
    Biomarkers for Myocardial Infarction and Chronic Heart FailureOscar Health2026-10-01
    Multiple Procedure Payment Reduction for Diagnostic Cardiovascular ProceduresBlue Cross Blue Shield - Maine2026-10-01
    Left Atrial Appendage Closure Devicesexcellus_health_plan_inc2026-09-17
    Left Atrial Appendage Closure Devicesuniverahealthcare2026-09-17
    Cardiac Omnibus CodesCigna2026-09-15

    Related Codes

    CPT-35500-ARM-VEIN-HARVEST-FOR-BYPASS-CONDUIT

    CPT 35500: Upper Extremity Vein Harvest for Bypass Conduit

    CPT-35501-CAROTID-COMMON-TO-INTERNAL-ARTERY-BYPASS-GRAFT

    CPT 35501: Carotid Bypass, Common to Internal Carotid Artery

    CPT-35506-CAROTID-TO-SUBCLAVIAN-BYPASS-GRAFT

    CPT 35506: Carotid to Subclavian Bypass Graft

    CPT-35508-CAROTID-TO-VERTEBRAL-BYPASS-GRAFT

    CPT 35508: Carotid-to-Vertebral Artery Bypass Graft

    CPT-35509-CAROTID-TO-CAROTID-VEIN-BYPASS-GRAFT

    CPT 35509: Carotid-to-Carotid Vein Bypass Graft

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

    CPT 35511: Subclavian-to-Subclavian Vein Bypass Graft

    CPT-35512-SUBCLAVIAN-TO-BRACHIAL-ARTERY-VEIN-BYPASS

    CPT 35512: Subclavian-to-Brachial Artery Bypass with Vein Graft

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

    CPT 35515: Subclavian to Vertebral Artery Bypass with Vein Graft

    CPT-35516-SUBCLAVIAN-TO-AXILLARY-VEIN-BYPASS

    CPT 35516: Subclavian to Axillary Vein Bypass Graft

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

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

    Showing 1–10 of 32

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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