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    v1.0.30
    OpenPayerBilling CodesAbsolute Quantitation Of Myocardial Blood Flow (AQMBF) Determination ProcedureCPT cpt-0900t-ai-quantitative-myocardial-blood-flow
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    CPT 0900T: AI-Derived Absolute Quantitation of Myocardial Blood Flow

    CPT code 0900T describes an add-on AI-based, noninvasive analysis that provides absolute quantitation of myocardial blood flow (AQMBF) to assist interpretation of a primary stress cardiac magnetic resonance study; the service type is assistive advanced image analysis and the typical site of service is an imaging center or hospital outpatient radiology/cardiac imaging department where stress cardiac magnetic resonance 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 64-year-old patient with exertional chest pain and known coronary artery disease is referred for stress cardiac magnetic resonance (stress CMR) to evaluate ischemia and myocardial perfusion. The primary study is a pharmacologic stress CMR with contrast performed in an outpatient imaging center or hospital radiology/cardiology department. The imaging acquisition (including rest and stress perfusion sequences and late gadolinium enhancement) is completed by the technologist and interpreted by the reading cardiologist or radiologist. After acquisition of the primary stress CMR images, an FDA-cleared, noninvasive artificial intelligence (AI)–based software performs assistive analysis to estimate absolute quantitation of myocardial blood flow (AQMBF). The AI tool processes the existing perfusion datasets to generate quantitative perfusion metrics that supplement the qualitative interpretation.

    Workflow steps:

    • Patient check-in, vital signs, and screening for MRI contraindications.

    • Intravenous access placement and administration of contrast agent and pharmacologic stress agent per protocol.

    • MRI technologist performs rest and stress perfusion imaging and Late Gadolinium Enhancement sequences.

    • Imaging data transferred to the PACS and to the AI-based AQMBF software (local server or cloud service).

    • The AI tool analyzes perfusion sequences and returns quantitative myocardial blood flow values and color-coded maps.

    • Interpreting physician reviews AI outputs alongside primary images, incorporates results into the final report, and documents use of the add-on AI analysis (0900T) as assistive to the primary stress CMR service.

    Typical site of service:

    • Outpatient imaging center, hospital outpatient radiology/cardiology department, or cardiac catheterization suite with MRI capability.

    Typical patient scenario example:

    • A symptomatic patient with intermediate pretest probability for coronary ischemia undergoing a stress CMR for evaluation of inducible ischemia; the provider adds AI-derived absolute myocardial blood flow quantitation (0900T) to supplement perfusion interpretation and assist in clinical decision-making.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    75557Magnetic resonance angiography, chest; without contrast material, followed by contrast and further sequences (varies by code descriptors)Often billed for comprehensive cardiac MRI exams that include perfusion sequences; the primary stress CMR study components are reported with MRI codes.

    75561 | Cardiac MRI for morphology and function without contrast material, followed by with contrast, when performed | Represents cardiac MRI sequences for ventricular function that are commonly part of a complete stress CMR exam alongside perfusion analysis.

    75563 | Magnetic resonance imaging, heart, with stress imaging (with or without contrast) | Primary code covering stress perfusion cardiac MRI studies; 0900T is an add-on assistive analysis to the primary stress CMR service.

    0143T | Cardiovascular imaging, myocardial perfusion imaging, computed tomography, perfusion (may be modality-specific) | Alternative advanced myocardial perfusion quantitation in other modalities; included as related quantitative perfusion services in clinical workflow.

    93000 | Electrocardiogram, routine ECG with interpretation and report | Often performed concurrently for stress monitoring and orthogonal documentation during stress testing associated with cardiac imaging.

    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
    207RH0000X
    2084P0800X
    207T00000X
    2086S0122X
    103TC1900X
    224ZL0004X
    133V00000X
    225XF0002X

    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-0899T-AI-QUANTITATION-MYOCARDIAL-BLOOD-FLOW

    CPT 0899T: AI-Based 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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