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    OpenPayerBilling CodesSurgical, Imaging Devices and GraftsHCPCS hcpcs-c1604-transmural-transvenous-arterial-bypass-graft-implantable
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    HCPCS C1604: Graft, Transmural Transvenous Arterial Bypass (Implantable)

    HCPCS Level II code C1604 describes an implantable transmural transvenous arterial bypass graft system including all delivery system components, representing the surgical implant of a vascular bypass graft delivered transvenously and placed across the arterial wall; service type: implantable vascular graft procedure; typical site of service: inpatient or outpatient surgical setting or specialized vascular operating room where implantable vascular devices are placed.

    For related coverage guidance, see recent payer policy updates: Hip Arthroplasty (partial and total hip replacement), Shoulder Arthroplasty (Total, Partial, Reverse, Revision and Resurfacing), Artificial Lumbar Intervertebral Disc (Lumbar Total Disc Arthroplasty).

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    Table of contents

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    Clinical & Coding Specifications

    Clinical Context

    A typical patient is an adult with severe peripheral arterial disease or complex venous-arterial access needs who requires a transmural transvenous arterial bypass graft implantable device (C1604) to restore arterial perfusion. The patient often presents with chronic limb-threatening ischemia, rest pain, non-healing ischemic ulceration, or recurrent graft failure after prior reconstructive attempts. Preoperative evaluation includes vascular imaging (duplex ultrasound, CTA or MRA, and diagnostic angiography), cardiopulmonary assessment, medication optimization (antiplatelet and/or anticoagulation management), and wound care consultation if tissue loss is present.

    The clinical workflow: the patient is brought to a hybrid operating room or interventional radiology suite. Under general or monitored anesthesia care, vascular access is obtained percutaneously or via open exposure. The transmural transvenous arterial bypass graft and delivery system (C1604) are implanted using fluoroscopic and endovascular techniques, often with adjunctive angioplasty or stenting. Intraoperative angiography confirms graft position and flow. Postprocedure care includes vascular monitoring, limb perfusion checks, anticoagulation management, wound care, and surveillance imaging at planned intervals. Typical sites of service are an inpatient operating room, ambulatory surgery center, or an interventional radiology suite within a hospital setting depending on patient acuity and facility capabilities.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    93458Catheter placement, arterial, for diagnostic angiography, including intraprocedural injection(s) for selective angiography, imaging supervision and interpretation when performed; each additional vascular familyDiagnostic angiography frequently performed before or during graft implantation to map arterial anatomy and confirm placement.
    75960Angiography, vascular, noncoronary, radiological supervision and interpretationPerformed for pre- or intra-procedural imaging to document blood flow and graft function.
    37227Revascularization, endovascular, open or percutaneous, femoral-popliteal artery, includes transluminal angioplasty, stent placement when performedOften performed adjunctively when treating peripheral arterial disease in the same session as graft implantation.
    33999Unlisted procedure, cardiac or pericardialMay be used for reporting novel or unlisted complex implantable bypass systems when no specific CPT exists.
    32998Insertion of special arterial bypass graft device, implantable (unlisted)Used when an implantable transmural transvenous arterial bypass device does not have a specific CPT code and an unlisted code is required.

    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…
    51Modifier –51 (Multiple Procedures) is used when the same provider performs multiple procedures in the same session to identify secondary, non‑exempt procedures and indicate payment reduction logic…- Use modifier -51 when the same provider performs multiple distinct procedures during the same patient encounter: report the highest‑valued procedure first (no modifier) and append -51 to…
    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…
    56Modifier ‑56 indicates the reporting provider furnished only the preoperative management for a surgical procedure and did not perform the intraoperative or postoperative care. It is used in…- Use Modifier -56 when a provider performs only the preoperative management in a split‑care situation (one physician manages preop care while a different physician performs the intraoperative…
    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…
    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 CodeSpecialtyNotes
    207K00000XAllergy & Immunology PhysicianAn allergist-immunologist is trained in evaluation, physical and laboratory diagnosis, and management of disorders involving the immune system. Select…
    207L00000XAnesthesiology PhysicianAn anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an opera…
    2084P0800XPsychiatry PhysicianA Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, …
    207RI0001XClinical & Laboratory Immunology (Internal Medicine) PhysicianAn internal medicine physician who specializes in clinical and laboratory immunology disease management.
    363L00000XNurse Practitioner(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision mak…
    1835S0206XSolid Organ Transplant PharmacistA licensed pharmacist who has demonstrated specialized knowledge and skill delivering direct patient care and the safe and effective use of medication…
    1835P0018XPharmacist Clinician (PhC)/ Clinical Pharmacy SpecialistPharmacist Clinician/Clinical Pharmacy Specialist is a pharmacist with additional training and an expanded scope of practice that may include prescrip…
    207SG0205XPh.D. Medical Genetics PhysicianA medical geneticist works in association with a medical specialist, is affiliated with a clinical genetics program and serves as a consultant to medi…

    Related Payer Policy Updates

    Specialty: Orthopedics/Musculoskeletal1 / 2

    7 rows

    PolicyPayerEffective Date
    Hip Arthroplasty (partial and total hip replacement)univerahealthcare2026-10-15
    Shoulder Arthroplasty (Total, Partial, Reverse, Revision and Resurfacing)univerahealthcare2026-10-15
    Artificial Lumbar Intervertebral Disc (Lumbar Total Disc Arthroplasty)univerahealthcare2026-10-15
    Metal-on-Metal Total Hip Resurfacinguniverahealthcare2026-10-15
    Lumbar Fusion (arthrodesis) with decompressionuniverahealthcare2026-10-15
    Osteochondral Grafting of the Kneeuniverahealthcare2026-10-15
    Sacroiliac Joint Fusion or Stabilizationuniverahealthcare2026-10-15

    Related Codes

    HCPCS-C1600-INTRAVASCULAR-LESION-PREPARATION-BLADED-CATHETER

    HCPCS Level II C1600: Transluminal Lesion Preparation Bladed Sheathed Catheter

    HCPCS-C1601-DISPOSABLE-PULMONARY-ENDOSCOPE-IMAGING

    HCPCS Level II C1601: Single-Use Pulmonary Imaging/Illumination Endoscope

    HCPCS-C1602-ABSORBABLE-ANTIMICROBIAL-BONE-VOID-FILLER-IMPLANTABLE

    HCPCS C1602: Absorbable Antimicrobial-Eluting Bone Void Filler

    HCPCS-C1603-IVC-FILTER-RETRIEVAL-LASER-DEVICE

    HCPCS Level II C1603: Laser Retrieval Device for IVC Filter

    HCPCS-C1605-LEADLESS-DUAL-CHAMBER-PACEMAKER-IMPLANTATION

    HCPCS C1605: Leadless Dual-Chamber Pacemaker Implantation

    HCPCS-C1606-ENDOSCOPIC-ULTRASOUND-ADAPTER-DISPOSABLE

    HCPCS C1606: Adapter for Ultrasound Attachment to Upper GI Endoscope

    HCPCS-C1607-IMPLANTABLE-RECHARGEABLE-NEUROSTIMULATOR-INTEGRATED

    HCPCS Level II C1607: Implantable Rechargeable Neurostimulator

    HCPCS-C1608-TOTAL-DUAL-MOBILITY-FIRST-CARPOMETACARPAL-PROSTHESIS

    HCPCS Level II C1608: Total Dual Mobility Prosthesis, First CMC Joint

    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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