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    v1.0.28
    OpenPayerBilling CodesCardiac Muscle ImagingCPT cpt-0541t-multichannel-magnetocardiography-cardiac-ischemia
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    CPT 0541T: Multichannel Magnetocardiography for Cardiac Ischemia

    CPT code 0541T describes a single multichannel magnetocardiography (MCG) imaging study used to detect cardiac ischemia in a patient presenting with chest pain; the service is a diagnostic cardiac imaging procedure that uses a minimum 36-channel MCG system to generate magnetic-field time-series images, perform quantitative magnetic dipole analysis, produce a clinical score, and generate an automatic report. Service type: diagnostic cardiac imaging study. Typical site of service: outpatient imaging center or hospital-based cardiac imaging department.

    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 58-year-old man presents to the outpatient cardiology clinic and emergency department with new-onset exertional chest discomfort and intermittent shortness of breath. Initial evaluation includes history, physical exam, 12-lead ECG, and cardiac biomarkers. ECG is nondiagnostic and serial troponins are negative, but the clinician remains concerned for myocardial ischemia given exertional symptoms and multiple risk factors (hypertension, hyperlipidemia, smoking). The provider orders multichannel magnetocardiography (MCG) to noninvasively assess for cardiac ischemia.

    The clinical workflow: the patient is scheduled for a single MCG study using a system with at least 36 channels. The technologist confirms no metal or magnetic implants, positions the patient supine, and records multichannel magnetic-field time-series data. The system performs quantitative magnetic dipole analysis, generates a clinical ischemia score, and produces an automated report. The interpreting physician (cardiologist or cardiac electrophysiologist) reviews the numeric analysis, correlates findings with ECG and clinical data, documents the interpretation, and provides recommendations for further management (stress testing, coronary angiography, or medical therapy) as clinically indicated.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    93000Electrocardiogram, routine ECG with at least 12 leads; with interpretation and reportPerformed as an initial cardiac electrical assessment before or alongside MCG for correlation.
    93010Electrocardiogram interpretation and report onlyUsed when ECG is obtained separately and only interpretation is billed, often correlated with MCG findings.
    93015Tracing only, ECG all leads, without interpretation and reportUsed if ECG raw data are acquired as part of monitoring but interpretation billed elsewhere; complements MCG data.
    93306Echocardiography, transthoracic, complete, with interpretation and reportPerformed to assess structural heart disease that may affect ischemia evaluation and to complement MCG results.
    93040Rhythm and ST analysis, continuousContinuous rhythm/ST-segment analysis may be used in parallel clinical workflows for ischemia surveillance alongside MCG.

    Related Modifiers

    7 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…
    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…
    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…
    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…
    82Modifier 82 is appended to a surgical CPT code to indicate that an attending physician acted as an assistant because a qualified resident surgeon was unavailable. In teaching hospitals it documents…- When to use: Append modifier 82 in teaching-hospital settings to indicate a physician served as an assistant surgeon because a qualified resident surgeon was unavailable (includes situations where…

    Related Provider Taxonomies

    8 rows

    Taxonomy CodeSpecialtyNotes
    2084P0800XPsychiatry PhysicianA Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, …
    207RP1001XPulmonary Disease PhysicianAn internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational an…
    363L00000XNurse Practitioner(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision mak…
    363A00000XPhysician AssistantA physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and…
    207RB0002XObesity Medicine (Internal Medicine) PhysicianA physician who specializes in the treatment of obesity demonstrates competency in and a thorough understanding of the treatment of obesity and the ge…
    204R00000XElectrodiagnostic Medicine PhysicianElectrodiagnostic medicine is the medical subspecialty that applies neurophysiologic techniques to diagnose, evaluate, and treat patients with impairm…
    320700000XPhysical Disabilities Residential Treatment FacilityA residential facility that provides habilitation services and other care and treatment to adults or children diagnosed with physical disabilities and…
    2470A2800XAssistant Health Information Record TechnicianNone

    Related ICD-10-CM Codes

    28 rows

    ICD-10-CM CodeDescription
    E11.9Type 2 diabetes mellitus without complications
    E78.5Hyperlipidemia, unspecified
    G45.9Transient cerebral ischemic attack, unspecified
    I20.0Unstable angina
    I20.1Angina pectoris with documented spasm
    I20.9Angina pectoris, unspecified
    I21.3ST elevation (STEMI) myocardial infarction of unspecified site
    I21.9Acute myocardial infarction, unspecified
    I25.10Atherosclerotic heart disease of native coronary artery without angina pectoris
    I25.110Atherosclerotic heart disease of native coronary artery with unstable angina pectoris

    Showing 1–10 of 28

    Related Payer Policy Updates

    Specialty: Cardiology1 / 3

    6 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

    Related Codes

    CPT-0542T-MULTICHANNEL-MAGNETOCARDIOGRAPHY-CARDIAC-ISCHEMIA

    CPT 0542T: Multichannel Magnetocardiography for Cardiac Ischemia Detection

    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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