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    v1.0.30
    OpenPayerBilling CodesAbsolute Quantitation Of Myocardial Blood Flow (AQMBF) Determination ProcedureCPT cpt-0899t-ai-quantitation-myocardial-blood-flow
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    CPT 0899T: AI-Based Absolute Quantitation of Myocardial Blood Flow

    CPT code 0899T describes an add-on AI-based, noninvasive analysis performed in conjunction with stress cardiac magnetic resonance imaging to determine absolute quantitation of myocardial blood flow (AQMBF); service type is adjunctive image analysis and the typical site of service is an outpatient imaging center or hospital radiology/cardiac MRI suite where stress CMR is performed.

    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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    Clinical & Coding Specifications

    Clinical Context

    A 62-year-old patient with known coronary artery disease and persistent exertional chest discomfort is referred for stress cardiac magnetic resonance (stress CMR) to evaluate ischemia and myocardial perfusion. The imaging study is performed in the hospital outpatient radiology or cardiology imaging suite. A technologist and MR-compatible monitoring staff prepare the patient, establish IV access, and administer pharmacologic stress (adenosine or regadenoson) per protocol while the cardiology or radiology team performs cine, perfusion, and late gadolinium enhancement sequences. The acquired stress CMR images and raw perfusion data are submitted to an FDA-cleared, AI-based post-processing platform that performs augmentative analysis to derive the absolute quantitation of myocardial blood flow (AQMBF) as an add-on service using 0899T. The interpreting physician reviews the AI-derived AQMBF output alongside the primary stress CMR images and incorporates the quantitative perfusion values into the final report to aid clinical decision-making regarding ischemia severity and potential revascularization. Typical sites of service include hospital outpatient imaging centers, ambulatory imaging centers, and tertiary academic medical centers with advanced cardiac MRI capability.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    75557Magnetic resonance angiography, heart, with contrast, including stress and rest perfusion when performed; quantification and post-processingPrimary or companion cardiac MR service that includes perfusion imaging; 0899T augments these datasets with AI-derived absolute MBF.
    75561Magnetic resonance, cardiac, with pharmacologic stress perfusion, including interpretation and reportingCore stress CMR perfusion acquisition and interpretation; 0899T is an add-on analytic service applied to perfusion data from codes like 75561.
    0143TMyocardial PET perfusion, quantification of myocardial blood flow, tomographic (for reference)Provides absolute MBF by PET; listed for clinical workflow correlation when comparing AI-derived CMR AQMBF to PET standards.
    763773D rendering with interpretation; for vascular structures (list separately in addition to primary)Post-processing code for advanced image rendering that may be performed alongside AI quantitation for reporting.
    96040Medical transcription service, review and correction (non-physician) (example ancillary)Ancillary documentation and report preparation services that may support finalized reports containing AQMBF results.

    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…
    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…
    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…
    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…
    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…

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    207RC0000X
    2084P0800X
    174400000X
    2086S0122X
    253Z00000X
    343800000X
    3104A0630X
    363LC1500X

    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-0900T-AI-QUANTITATIVE-MYOCARDIAL-BLOOD-FLOW

    CPT 0900T: AI-Derived Absolute Quantitation of Myocardial Blood Flow

    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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