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    v1.0.30
    OpenPayerBilling CodesAlgorithmically Generated 12-Lead ECG ProceduresCPT cpt-0904t-reduced-lead-ecg-derived-12-lead-tracing
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    CPT 0904T: Reduced‑Lead ECG with Algorithmic 12‑Lead Reconstruction

    CPT code 0904T describes use of a reduced‑lead electrocardiogram (ECG) device to collect heart rhythm data that an algorithm reconstructs into a 12‑lead ECG tracing; the service is a diagnostic ECG acquisition and algorithmic reconstruction provided typically as an ambulatory or outpatient diagnostic cardiac test, with the output limited to the electrocardiographic tracing only (no interpretation or report).

    For related coverage guidance, see recent payer policy updates: Automated Ambulatory Blood Pressure Monitoring for Diagnosis of Hypertension in Patients with Elevated Office Blood Pressure, Cardiology - Ivabradine, Cardiac Computed Tomography (CCT)/Coronary Computed Tomographic Angiography (CCTA).

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    Table of contents

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    Clinical & Coding Specifications

    Clinical Context

    A 62-year-old patient with intermittent palpitations and a prior history of hypertension presents to an outpatient cardiology clinic. The provider applies a reduced‑lead ECG device that records rhythm strips over a short monitoring interval. The device transmits the reduced‑lead signals to an automated algorithm that reconstructs a 12‑lead ECG tracing. The clinic receives only the reconstructed ECG tracing without an interpretation or diagnostic report. Typical workflow: patient check‑in, brief symptom history and indication documented, device placement and recording performed by a trained technician or medical assistant, data sent to the algorithm for reconstruction, clinic staff downloads the 12‑lead tracing and files it in the medical record; a cardiologist may later review and provide a separate interpretation or use the tracing to determine need for further testing such as a full 12‑lead ECG, ambulatory monitor, or urgent evaluation.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    0904TReduced‑lead ECG used to collect rhythm data and reconstruct a 12‑lead ECG; tracing only provided without interpretationPrimary code for the reconstructed tracing service described.
    93000Electrocardiogram, routine ECG with at least 12 leads; with interpretation and reportOften performed when a formal 12‑lead ECG with interpretation is required after review of the reconstructed tracing.
    93005Electrocardiogram, tracing only, without interpretation and reportAlternative for situations where only an ECG tracing is provided without interpretation; used for standard 12‑lead tracings without report.
    93228External ambulatory ECG event monitor recording and review (e.g., single/auto trigger)May be used when extended rhythm monitoring is indicated following abnormal reconstructed tracing.
    93229Analysis of continuous rhythm data for events, reviewed and interpretedUsed when algorithmic or manual analysis of extended monitoring is provided with interpretation.
    93010Interpretation and report only for electrocardiogramUsed when a clinician provides only the interpretation of an ECG tracing that was furnished by another party.

    Related Modifiers

    5 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…
    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 Code
    207RC0000X
    207RP1001X
    363L00000X
    246Q00000X
    363A00000X
    2084N0008X
    175M00000X
    2082S0105X

    Related ICD-10-CM Codes

    29 rows

    ICD-10-CM CodeDescription
    E11.9Type 2 diabetes mellitus without complications
    E66.9Obesity, unspecified
    E78.5Hyperlipidemia, unspecified
    F41.9Anxiety disorder, unspecified
    G45.8Other transient cerebral ischemic attacks and related syndromes
    G45.9Transient cerebral ischemic attack, unspecified
    I20.9Angina pectoris, unspecified
    I21.3ST elevation (STEMI) myocardial infarction of unspecified site
    I25.10Atherosclerotic heart disease of native coronary artery without angina pectoris
    I34.0Nonrheumatic mitral (valve) insufficiency

    Showing 1–10 of 29

    Related Payer Policy Updates

    Specialty: Cardiology1 / 3

    10 rows

    PolicyPayerEffective Date
    Automated Ambulatory Blood Pressure Monitoring for Diagnosis of Hypertension in Patients with Elevated Office Blood PressureBluecross Idaho2026-11-01
    Cardiology - IvabradineCigna2026-10-15
    Cardiac Computed Tomography (CCT)/Coronary Computed Tomographic Angiography (CCTA)univerahealthcare2026-10-15
    Percutaneous Ventricular Assist DeviceUnitedHealthcare2026-10-01
    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
    Left Atrial Appendage Closure Devicesexcellus_health_plan_inc2026-09-17
    Left Atrial Appendage Closure Devicesuniverahealthcare2026-09-17
    Cardiac Omnibus CodesCigna2026-09-15

    Related Codes

    CPT-0903T-ALGORITHM-DERIVED-12-LEAD-ECG-INTERPRETATION

    CPT 0903T: Reduced‑Lead ECG with Algorithmic 12‑Lead Reconstruction and Interpretation

    CPT-0905T-INTERPRETATION-REPORT-ALGORITHM-DERIVED-12-LEAD-ECG

    CPT 0905T: Interpretation of Algorithm‑Generated 12‑Lead ECG from Reduced‑Lead Recording

    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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