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    v1.0.28
    OpenPayerBilling CodesBypass Graft Procedures Other Than VeinCPT cpt-35656-femoral-to-popliteal-bypass-synthetic-graft
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    CPT 35656: Femoral to Popliteal Bypass with Synthetic Graft

    Medicare pays $972 on average nationally for this procedure.

    CPT code 35656 describes a surgical femoral-to-popliteal bypass using a synthetic graft to reroute blood flow around a femoral artery blockage; this is a vascular bypass grafting procedure typically performed as an open surgical revascularization in an operating room or similar inpatient/outpatient surgical setting to restore distal lower-extremity perfusion.

    For related coverage guidance, see recent payer policy updates: Site of Service Ambulatory Service Center (ASC) Select — Surgical or Diagnostic Procedures in Adults, Site of Service Ambulatory Surgical Center (ASC) Select — Surgical or Diagnostic Procedures in Adults, Site of Service Ambulatory Service Center (ASC) Select.

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    Table of contents

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    Clinical & Coding Specifications

    Clinical Context

    A 68-year-old male with a long history of peripheral arterial disease (PAD), progressive lifestyle-limiting claudication of the right lower extremity, and an occlusive lesion of the superficial femoral artery presents after noninvasive vascular studies and angiography confirm a high-grade femoral artery occlusion with inadequate runoff to the distal tibial vessels. Conservative therapy including smoking cessation, exercise therapy, and pharmacotherapy failed to relieve symptoms. The vascular surgery team schedules an open femoro-popliteal bypass using a synthetic prosthetic graft to re-establish inflow to the popliteal artery distal to the occlusion.

    Preoperative workflow includes history and physical, cardiac risk assessment, duplex ultrasound and/or CT angiography to map inflow and outflow vessels, informed consent specifying use of a synthetic conduit, and perioperative medication management. Intraoperative steps include exposure of the common femoral and popliteal arteries, systemic heparinization, proximal and distal anastomoses of the synthetic graft (bypass from femoral to popliteal), verification of graft patency via Doppler or completion angiography, and wound closure. Postoperative care includes limb perfusion monitoring, antiplatelet therapy, graft surveillance with duplex ultrasound, and wound care. Typical site of service is an inpatient or outpatient hospital operating room or an ambulatory surgical center when appropriate for patient risk.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    36820Arterial embolectomy or thrombectomy, with or without catheter; iliac, femoral, or poplitealPerformed when acute thromboembolism is present and may be used before or instead of bypass if embolus removal is feasible
    35666Extra-anatomic bypass, prosthetic, femoral to popliteal, above-kneeAlternate code for femoro-popliteal bypass to the above-knee popliteal target; closely related when graft target differs
    35566Revascularization, bypass graft, with other specified sites (note: used for arterial bypass procedures)May describe similar or adjunctive bypass procedures depending on anatomic specifics (verify code applicability)
    36147Introduction of needle or catheter into vessel for diagnostic angiography, lower extremity (including transluminal angioplasty)Diagnostic angiography or catheter-based interventions often performed preoperatively or intraoperatively as adjuncts to surgical bypass
    93975Duplex scan of arterial inflow and outflow, bilateral studyNoninvasive vascular testing used pre- and postoperatively for mapping and surveillance of bypass graft patency

    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…
    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…
    54Modifier ‑54 (“Surgical care only”) is appended to a CPT surgical procedure when the reporting surgeon performs the intraoperative (surgical) component but does not furnish the preoperative and/or…- Use modifier -54 when the reporting surgeon provided only the intraoperative (surgical) component of a procedure and preoperative and/or postoperative management has been or will be provided by…
    55Modifier –55 indicates the billing provider furnished only postoperative management for a procedure that has a global surgical period. According to AAPC, this modifier is appended to the same CPT…- Use modifier -55 when billing the same CPT surgical code that has a 10- or 90-day global period and you, as a provider other than the original surgeon, furnished ONLY postoperative management (no…
    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…
    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…
    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…

    Showing 1–10 of 11

    Related Provider Taxonomies

    8 rows

    Taxonomy CodeSpecialtyNotes
    207P00000XEmergency Medicine PhysicianAn emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospit…
    2080P0206XPediatric Gastroenterology PhysicianA pediatrician who specializes in the diagnosis and treatment of diseases of the digestive systems of infants, children and adolescents. This speciali…
    207R00000XInternal Medicine PhysicianA physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults…
    207K00000XAllergy & Immunology PhysicianAn allergist-immunologist is trained in evaluation, physical and laboratory diagnosis, and management of disorders involving the immune system. Select…
    207PP0204XPediatric Emergency Medicine (Emergency Medicine) PhysicianPediatric Emergency Medicine is a clinical subspecialty that focuses on the care of the acutely ill or injured child in the setting of an emergency de…
    103TM1800XIntellectual & Developmental Disabilities PsychologistBehavioral Health & Social Service Providers · Psychologist
    224L00000XPedorthistAn individual who is trained in the management and treatment of conditions of the foot, ankle, and lower extremities requiring fitting, fabricating, a…
    225A00000XMusic TherapistMusic therapists use music interventions to assess clients' strengths and needs, develop goals, implement services, and evaluate and document progress…

    Related ICD-10-CM Codes

    27 rows

    ICD-10-CM CodeDescription
    E11.51Type 2 diabetes mellitus with diabetic peripheral angiopathy without gangrene
    I65.29Occlusion and stenosis of unspecified carotid artery
    I67.2Cerebral atherosclerosis
    I70.0Atherosclerosis of aorta
    I70.213Atherosclerosis of native arteries of extremities with intermittent claudication, bilateral legs
    I70.229Atherosclerosis of native arteries of extremities with rest pain, unspecified extremity
    I70.232Atherosclerosis of native arteries of right leg with ulceration of calf
    I70.233Atherosclerosis of native arteries of right leg with ulceration of ankle
    I70.234Atherosclerosis of native arteries of right leg with ulceration of heel and midfoot
    I70.239Atherosclerosis of native arteries of right leg with ulceration of unspecified site

    Showing 1–10 of 27

    Related Payer Policy Updates

    Specialty: General Surgery1 / 2

    10 rows

    PolicyPayerEffective Date
    Site of Service Ambulatory Service Center (ASC) Select — Surgical or Diagnostic Procedures in AdultsPremera Bluecross2026-09-01
    Site of Service Ambulatory Surgical Center (ASC) Select — Surgical or Diagnostic Procedures in AdultsPremera Bluecross2026-09-01
    Site of Service Ambulatory Service Center (ASC) SelectPremera Bluecross2026-09-01
    Site of Service Ambulatory Surgical Center (ASC) Select — Site of Service for Ambulatory Surgical Procedures (ASC Select)Premera Bluecross2026-09-01
    Site of Service Ambulatory Service Center (ASC) SelectPremera Bluecross2026-09-01
    Outpatient Surgical Procedures - Site of Servicesierra health and life2026-08-01
    Medical Necessity Guidelines — Inpatient Surgical CareMass General Brigham Health Plan2026-08-01
    Ambulatory Surgery Center (ASC) - Site of Care PolicyKaiser Permanente2026-08-01
    Inpatient Surgical Site of ServiceProvidence Health Plan2026-07-01
    Removal of Implantable DevicesBlue Cross Blue Shield - Rhode Island2026-07-01

    Related Codes

    CPT-35600-ARTERIAL-GRAFT-HARVEST-ARM-FOR-CORONARY-BYPASS

    CPT 35600: Arm Artery Harvest for Coronary Bypass

    CPT-35601-CAROTID-COMMON-ARTERY-BYPASS-SYNTHETIC-GRAFT

    CPT 35601: Common Carotid Artery Bypass with Synthetic Graft

    CPT-35602-CAROTID-TO-CAROTID-PROSTHETIC-ARTERIAL-BYPASS

    CPT 35602: Carotid-to-Carotid Bypass with Prosthetic Graft

    CPT-35606-SUBCLAVIAN-ARTERY-BYPASS-SYNTHETIC-GRAFT

    CPT 35606: Subclavian Artery Bypass with Synthetic Graft

    CPT-35612-SUBCLAVIAN-ARTERY-BYPASS-SYNTHETIC-GRAFT

    CPT 35612: Subclavian Artery Bypass with Synthetic Graft

    CPT-35616-SUBCLAVIAN-TO-AXILLARY-BYPASS-SYNTHETIC-GRAFT

    CPT 35616: Subclavian to Axillary Bypass with Synthetic Graft

    CPT-35621-AXILLOFEMORAL-BYPASS-SYNTHETIC-GRAFT

    CPT 35621: Axillary–Femoral Bypass with Synthetic Graft

    CPT-35623-AXILLARY-TO-POPLITEAL-OR-TIBIAL-BYPASS-SYNTHETIC-GRAFT

    CPT 35623: Axillofemoral to Popliteal/Tibial Bypass with Synthetic Graft

    CPT-35626-AORTIC-TO-SUBCLAVIAN-INNOMINATE-CAROTID-BYPASS-GRAFT

    CPT 35626: Aortic-to-Subclavian/Innominate/Carotid Bypass with Synthetic Graft

    CPT-35631-AORTO-VISCERAL-RENAL-BYPASS-SYNTHETIC-GRAFT

    CPT 35631: Aorto-Visceral Bypass with Synthetic Graft

    Showing 1–10 of 27

    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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