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    v1.0.30
    OpenPayerBilling CodesArterial Transposition ProceduresCPT cpt-35694-subclavian-to-carotid-artery-bypass
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    CPT 35694: Subclavian-to-Carotid Artery Bypass, Surgical Revascularization

    Medicare pays $900 on average nationally for this procedure.

    CPT code 35694 describes a surgical arterial bypass in which the provider fully exposes and divides the subclavian artery and anastomoses it to the carotid artery to bypass an area of arterial blockage, improving arterial blood flow; this procedure is a surgical revascularization service typically performed in an operating room or vascular surgery suite under general anesthesia and is classified as a vascular surgery arterial reconstruction 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 typical patient is a 68-year-old male with symptomatic left upper extremity ischemia and vertebrobasilar insufficiency due to severe proximal left subclavian artery stenosis (subclavian steal phenomenon). He presents with exertional left arm claudication, decreased brachial pulses, and episodic dizziness. Noninvasive vascular testing (duplex ultrasound, ABI, and/or CTA) demonstrates high-grade proximal left subclavian artery occlusive disease proximal to the vertebral artery origin. After endovascular options are considered and either are not feasible or have failed, the vascular surgery team schedules an open carotid–subclavian bypass.

    Preoperative workflow includes vascular laboratory imaging, cardiopulmonary risk assessment, medication review (antiplatelet and anticoagulation management), and informed consent. Intraoperative workflow involves general anesthesia, exposure of the ipsilateral common carotid artery and subclavian artery, division or bypass of the subclavian artery with creation of an anastomosis to the carotid artery, hemostasis, and wound closure. Postoperative care includes monitoring for neurologic changes, upper extremity perfusion, anticoagulation/antiplatelet therapy adjustment, and surveillance duplex before discharge and during follow-up.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    35694Carotid-subclavian bypass, open; refers to exposure, division and anastomosis of subclavian artery to carotid artery to bypass blockage and improve arterial flowPrimary procedure for surgical revascularization of subclavian occlusion.
    35301Thromboendarterectomy, peripheral arterial, with or without patch graft; for use when concurrent carotid or subclavian endarterectomy is performedMay be performed if concomitant endarterectomy of the carotid or subclavian is indicated.
    34931Thoracic aorta repair, extra-anatomic bypass (may vary by specific technique)Related when additional extra-anatomic bypass or aortic exposure is required.
    36247Selective catheter placement, arterial system; for diagnostic angiography of upper extremity vesselsPerformed preoperatively for diagnostic angiography or intraoperative angiographic assessment.
    93925Duplex scan of extremity arteries with segmental pressures and waveform analysisCommonly used pre- and postoperatively for noninvasive vascular assessment.
    36831Transplantation or bypass graft revision (coded for specific graft revisions)Performed for graft revision or thrombectomy if postoperative graft complication occurs.

    Related Modifiers

    13 rows

    ModifierDescriptionWhen to Use
    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…
    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…
    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…
    79Modifier 79 indicates a surgical procedure performed during the postoperative global period of a prior surgery that is unrelated to the original procedure. Per AMA/CPT and CMS guidance, it is…- Use modifier 79 when the same physician (or same‑specialty physician in the same group) performs a surgical procedure during the postoperative global period of a prior surgery and the new procedure…
    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…
    76Modifier -76, Repeat Procedure or Service by Same Physician or Other Qualified Health Care Professional, is appended when the same provider performs an identical, medically necessary procedure or…- Use modifier -76 when the same physician or other qualified health care professional performs an identical procedure or service a second (or subsequent) time on the same date of service and the…
    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…
    23Modifier -23 (Unusual Anesthesia) is used on anesthesia service CPT codes when a procedure that normally requires no anesthesia or only local anesthesia must be performed under general anesthesia…- Use modifier -23 only on anesthesia CPT codes (00100–01999) when a procedure that normally requires no anesthesia or only local anesthesia must be performed under general anesthesia because of…
    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…
    59Modifier 59 indicates a distinct procedural service when two procedures that are not normally billed together are clinically and procedurally separate. The CPT definition (as reiterated by CMS)…- Use modifier -59 to report a distinct procedural service when documentation supports that the procedure reported is not normally billed together with another service on the same day because of a…

    Showing 1–10 of 13

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    2865X1600X
    207ND0101X
    2278C0205X
    311Z00000X
    133VN1004X
    173C00000X
    261QG0250X
    347B00000X

    Related ICD-10-CM Codes

    21 rows

    ICD-10-CM CodeDescription
    E78.5Hyperlipidemia, unspecified
    G45.9Transient cerebral ischemic attack, unspecified
    I10Essential (primary) hypertension
    I63.30Cerebral infarction due to thrombosis of unspecified 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
    I65.29Occlusion and stenosis of unspecified carotid artery
    I70.201Unspecified atherosclerosis of native arteries of extremities, right leg

    Showing 1–10 of 21

    Related Payer Policy Updates

    Specialty: Cardiology1 / 3

    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-35691-VERTEBRAL-TO-CAROTID-ARTERY-ANASTOMOSIS

    CPT 35691: Vertebral Artery to Carotid Anastomosis

    CPT-35693-VERTEBRAL-TO-SUBCLAVIAN-ARTERY-BYPASS

    CPT 35693: Vertebral to Subclavian Artery Bypass

    CPT-35695-CAROTID-SUBCLAVIAN-BYPASS-ARTERIAL-BYPASS

    CPT 35695: Carotid-to-Subclavian Arterial Bypass

    CPT-35697-ARTERIAL-TRANSPOSITION-REIMPLANTATION

    CPT 35697: Arterial Transposition/Reimplantation, Two Arteries

    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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