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    v1.0.28
    OpenPayerBilling CodesCardiac Muscle ImagingCPT cpt-0542t-multichannel-magnetocardiography-cardiac-ischemia
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    CPT 0542T: Multichannel Magnetocardiography for Cardiac Ischemia Detection

    CPT code 0542T describes a single multichannel magnetocardiography (MCG) imaging study used to detect cardiac ischemia in a patient presenting with chest pain; the service includes acquisition with a minimum 36-channel device that generates magnetic-field time-series images, quantitative magnetic dipole analysis, a clinical score, interpretation by the provider, and a prepared report. Service type: diagnostic cardiac imaging with quantitative analysis. Typical site of service: outpatient imaging center or hospital-based diagnostic laboratory where advanced cardiac electrophysiologic imaging is performed.

    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 patient presents to an outpatient cardiac imaging center reporting acute onset chest discomfort and intermittent exertional chest tightness over several days. Vital signs are stable, and initial ECG and troponin results are non-diagnostic. The ordering cardiologist requests noninvasive multichannel magnetocardiography to evaluate for occult myocardial ischemia. The patient is screened for metal implants and contraindications, positioned in the magnetically shielded room, and a multichannel MCG system with at least 36 channels performs a single study that records magnetic-field, time-series cardiac signals. The interpreting provider (cardiologist or electrocardiography specialist) performs quantitative analysis of magnetic dipoles, reviews the automated clinical score and generated automatic report, documents interpretation findings, and prepares a final report sent to the referring clinician. Typical site of service is an outpatient hospital-based or freestanding cardiac imaging facility; the service may also occur in ambulatory surgical centers equipped with appropriate magnetically shielded rooms. Service type: advanced diagnostic noninvasive cardiac imaging with physician interpretation and reporting.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    93000Electrocardiogram, routine ECG with at least 12 leads; with interpretation and reportOften performed before or alongside MCG to provide standard electrical ECG correlation and to document baseline rhythm.
    93010Electrocardiogram interpretation and report onlyUsed when only the interpretation of a separately acquired ECG is billed in conjunction with MCG interpretation.
    93015Cardiovascular stress test using maximal or submaximal treadmill or bicycle exercise, with continuous ECG monitoring, with interpretation and reportMay be performed before or after MCG when ischemia is exercise-induced and correlation with stress testing is needed.
    93306Echocardiography, transthoracic, real-time with image documentation, complete, with spectral and color DopplerFrequently used adjunctively to assess cardiac structure and function when ischemia is suspected.
    93042Rhythm monitoring, 12 lead, continuous overnight, interpretation and report (Holter-type)Ambulatory rhythm monitoring can complement MCG when intermittent symptoms or arrhythmias are of concern.

    Related Modifiers

    8 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…
    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…

    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, …
    364S00000XClinical Nurse SpecialistA registered nurse who, through a graduate degree program in nursing, or through a formal post-basic education program or continuing education courses…
    363L00000XNurse Practitioner(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision mak…
    261QS1200XSleep Disorder Diagnostic Clinic/CenterAmbulatory Health Care Facilities · Clinic/Center
    310400000XAssisted Living FacilityA facility providing supportive services to individuals who can function independently in most areas of activity, but need assistance and/or monitorin…
    320800000XMental Illness Community Based Residential Treatment FacilityA home-like residential facility providing psychiatric treatment and psycho/social rehabilitative services to individuals diagnosed with mental illnes…
    363LX0106XOccupational Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers · Nurse Practitioner
    163WC2100XContinence Care Registered NurseNursing Service Providers · Registered Nurse

    Related ICD-10-CM Codes

    29 rows

    ICD-10-CM CodeDescription
    E11.9Type 2 diabetes mellitus without complications
    E78.5Hyperlipidemia, unspecified
    G45.8Other transient cerebral ischemic attacks and related syndromes
    G45.9Transient cerebral ischemic attack, unspecified
    I10Essential (primary) hypertension
    I20.0Unstable angina
    I20.9Angina pectoris, unspecified
    I21.3ST elevation (STEMI) myocardial infarction of unspecified site
    I21.4Non-ST elevation (NSTEMI) myocardial infarction
    I25.10Atherosclerotic heart disease of native coronary artery without angina pectoris

    Showing 1–10 of 29

    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-0541T-MULTICHANNEL-MAGNETOCARDIOGRAPHY-CARDIAC-ISCHEMIA

    CPT 0541T: Multichannel Magnetocardiography for Cardiac Ischemia

    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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