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    v1.0.28
    OpenPayerBilling CodesRepair Procedures for Single Ventricle and Other Complex Cardiac AnomaliesCPT cpt-33621-thoracic-endovascular-stent-placement
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    CPT 33621: Percutaneous Thoracic Vascular Stent Placement

    Medicare pays $891 on average nationally for this procedure.

    CPT code 33621 describes percutaneous trans-thoracic catheter insertion and placement of an intravascular stent to treat a stenosed segment, with balloon or other expansion to restore vessel patency; this is an endovascular stent placement procedure (vascular intervention) typically performed in an interventional radiology or cardiothoracic operating suite or catheterization lab and is billed as a percutaneous thoracic vascular intervention service.

    For related coverage guidance, see recent payer policy updates: Cardiac Computed Tomography (CCT)/Coronary Computed Tomographic Angiography (CCTA), Cardiovascular Disease Risk Assessment, Biomarkers for Myocardial Infarction and Chronic Heart Failure.

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    Table of contents

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    Clinical & Coding Specifications

    Clinical Context

    A 68-year-old male with progressive exertional dyspnea and signs of right-sided heart failure is evaluated for symptomatic pulmonary artery stenosis identified on prior CT angiography. After diagnostic right heart catheterization demonstrating a flow-limiting lesion in the proximal pulmonary artery, the interventional cardiothoracic team schedules a trans-thoracic catheter-based pulmonary artery stent placement. The patient arrives to the hospital procedure suite under monitored anesthesia care or general anesthesia. Vascular access is obtained via a central venous approach through the chest (commonly via the internal jugular or subclavian vein), and a guide catheter is advanced into the pulmonary artery. Contrast angiography delineates the stenosis, a stent is sized and delivered across the narrowed segment, and the stent is deployed and expanded to restore vessel lumen and pulmonary blood flow. Hemostasis is achieved at the access site, the patient is monitored in the recovery area or ICU depending on hemodynamics, and post-procedure imaging and anticoagulation/antiplatelet plans are implemented per institutional protocol.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    93451Right heart catheterization including measurement of oxygen saturation and cardiac outputOften performed before or during pulmonary artery stenting to measure hemodynamics and guide intervention.
    93568Transcatheter transcatheter placement of intravascular stent(s), pulmonary artery, percutaneous; single vesselRelated pulmonary artery stent code for certain percutaneous approaches (technique-specific coding may vary).
    36248Selective catheter placement, pulmonary artery, diagnosticUsed when selective pulmonary angiography is performed to define lesion anatomy prior to stent deployment.
    93799Unlisted cardiovascular service or procedureUsed when a specific trans-thoracic catheter stent placement does not have an exact CPT match; submit supporting documentation.
    51702Insertion of temporary indwelling transurethral catheter; simple (for urinary drainage)Data not available in the input.

    Related Modifiers

    10 rows

    ModifierDescriptionWhen to Use
    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…
    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…
    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…
    73Modifier 73 indicates a facility-level outpatient hospital or ASC procedure that was discontinued after the patient was prepared and taken to the procedure/operating room but before any anesthesia…- When to use: Apply CPT modifier 73 on the FACILITY (outpatient hospital or ASC) claim when the patient has been fully prepared and physically taken into the procedure/operating room but 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…

    Related Provider Taxonomies

    8 rows

    Taxonomy CodeSpecialtyNotes
    208100000XPhysical Medicine & Rehabilitation PhysicianPhysical medicine and rehabilitation, also referred to as rehabilitation medicine, is the medical specialty concerned with diagnosing, evaluating, and…
    208000000XPediatrics PhysicianA pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectru…
    207RC0000XCardiovascular Disease PhysicianAn internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threaten…
    376J00000XHomemakerAn individual who provides general household activities such as meal preparation, laundry, and light housekeeping, when the individual regularly respo…
    207V00000XObstetrics & Gynecology PhysicianAn obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproducti…
    251X00000XSupports Brokerage AgencyA provider of service/function that assists participating individuals to make informed decisions about what will work best for them is consistent with…
    163WF0300XFlight Registered NurseNursing Service Providers · Registered Nurse
    163WP0200XPediatric Registered NurseNursing Service Providers · Registered Nurse

    Related Payer Policy Updates

    Specialty: Cardiology1 / 3

    10 rows

    PolicyPayerEffective Date
    Cardiac Computed Tomography (CCT)/Coronary Computed Tomographic Angiography (CCTA)univerahealthcare2026-10-15
    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
    Cardiovascular Disease Risk Assessmentblue cross blue shield - louisiana2026-09-15
    Cardiovascular Disease Risk AssessmentBlue Cross Blue Shield - New Mexico2026-09-04
    Computed Tomography to Detect Coronary Artery CalcificationBluecross Idaho2026-09-01
    Intracoronary Drug Delivery Balloon ProceduresBlue Cross Blue Shield - Rhode Island2026-09-01
    Cardiac Imaging Guidelinesevicore2026-09-01
    Percutaneous Left Atrial Appendage Closure Device for Stroke PreventionAmbetter Georgia2026-08-26

    Related Codes

    CPT-33600-CARDIAC-VALVE-REPAIR-PATCH-OR-SUTURE-INCOMPETENT-VALVE

    CPT 33600: Repair of Incompetent Cardiac Valve

    CPT-33602-SEMILUNAR-VALVE-REPAIR-AORTIC-PULMONARY-REGURGITATION

    CPT 33602: Aortic or Pulmonary Semilunar Valve Repair

    CPT-33606-DOUBLE-INLET-VENTRICLE-PULMONARY-ARTERY-TO-AORTA-JOIN

    CPT 33606: Pulmonary Artery-to-Aorta Connection for Double Inlet Ventricle

    CPT-33608-VENTRICLE-TO-PULMONARY-ARTERY-CONDUIT-REPAIR

    CPT 33608: Ventricle-to-Pulmonary Artery Conduit Repair

    CPT-33610-VENTRICULAR-SEPTAL-DEFECT-ENLARGEMENT-VALVED-DEVICE

    CPT 33610: Ventricular Septal Defect Enlargement with Valved Device

    CPT-33611-VENTRICULAR-SEPTAL-DEFECT-TUNNEL-GRAFT-TO-AORTA

    CPT 33611: Tunnel Graft From VSD to Aorta

    CPT-33612-INTRAVENTRICULAR-TUNNEL-GRAFT-VSD-REPAIR

    CPT 33612: Intraventricular Tunnel Graft from Aorta to VSD

    CPT-33615-ATRIAL-SEPTAL-DEFECT-PATCH-AND-PULMONARY-ARTERY-ANASTOMOSIS

    CPT 33615: Atrial Septal Defect Patch and Pulmonary Artery Anastomosis

    CPT-33617-SUPERIOR-VENA-CAVA-TO-PULMONARY-ARTERY-CONNECTION

    CPT 33617: Superior Vena Cava to Pulmonary Artery Bypass

    CPT-33619-NORWOOD-PROCEDURE-HLHS-AORTIC-ARCH-RECONSTRUCTION

    CPT 33619: Norwood Procedure for HLHS / Aortic Arch Repair

    Showing 1–10 of 12

    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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