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CPT 0899T: AI Quantitation of Myocardial Blood Flow

CPT code 0899T designates an add-on service that uses a noninvasive, artificial intelligence–based method to produce absolute quantitation of myocardial blood flow (AQMBF) from stress cardiac magnetic resonance imaging data. As an augmentative analytic layer applied to the primary stress cardiac magnetic resonance service, this CPT code enables reporting of a numeric myocardial perfusion metric that can inform clinical assessment of ischemia and microvascular function. Nationally, AI-enabled quantitative imaging is emerging as a distinct reimbursable service category, making clarity on coding important for providers and payers.

Payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context and service definition, comparisons of payer coverage approaches and benchmarking where available, and notes on common billing modifiers and interoperability considerations. The publication summarizes how 0899T fits into imaging service lines, typical sites of service, and the clinical situations where AQMBF reporting augments conventional stress cardiac MRI interpretation. Data not available in the input regarding associated taxonomies, ICD-10 diagnoses, and related codes is noted where applicable.

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Billing Code Overview

CPT code 0899T is an add-on, AI-based quantitative analysis used alongside primary stress cardiac magnetic resonance imaging. The service provides absolute quantitation of myocardial blood flow (AQMBF) by applying a noninvasive artificial intelligence algorithm to imaging data from the primary stress cardiac magnetic resonance service. This augmentative analysis yields a numeric measure of blood flow through the heart muscle, intended to enhance physiologic assessment of myocardial perfusion.

Service Type: AI-based augmentative image analysis (add-on to stress cardiac magnetic resonance)

Typical Site of Service: Imaging centers or hospital outpatient departments where stress cardiac magnetic resonance is performed

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CPT 0899T: AI Quantitation of Myocardial Blood Flow

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Billing Code Overview

Service Type: AI-based augmentative image analysis (add-on to stress cardiac magnetic resonance)

Typical Site of Service: Imaging centers or hospital outpatient departments where stress cardiac magnetic resonance is performed

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.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when work required to interpret or document the AI-derived AQMBF is substantially greater than usual.
`26`	Professional component	Use when reporting the physician interpretation portion separate from technical imaging acquisition.
`52`	Reduced services	Use if the AI analysis is partially completed or limited and billed at reduced service.
`53`	Discontinued procedure	Use if the AI processing or imaging acquisition is terminated due to patient instability before completion.
`62`	Two surgeons	Rare; use when two qualified physicians jointly perform the interpretation as required by local policy.
`73`	Discontinued outpatient procedure prior to anesthesia	Use when the outpatient imaging session is terminated prior to planned stress administration and AI analysis is not completed.
`78`	Unplanned return to operating/procedure room following initial procedure	Use when an unplanned repeat imaging procedure requiring repeat AI analysis occurs during the postoperative period.
`TC`	Technical component	Use when billing only the technical component of the combined service; note `0899T` is an add-on analytic service and TC may apply if reporting technical-only services in composite reporting.

Taxonomy Code	Specialty	Notes
207RC0000X	Adult Cardiology	Interpreting cardiologists typically order and review stress CMR and AQMBF analyses.
2084P0800X	Diagnostic Radiology	Radiologists with cardiac MRI expertise perform acquisition and interpretation.
261QM0800X	Cardiac Electrophysiology	Electrophysiologists may utilize perfusion quantification when evaluating ischemic substrates.
174400000X	Nuclear Cardiology	Nuclear cardiologists may correlate PET perfusion quantitation with CMR AQMBF results.
2086S0122X	Cardiac MRI Specialist	Advanced imaging physicians who perform specialized post-processing and interpretation.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
Data not available in the input.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`75557`	Magnetic resonance angiography, heart, with contrast, including stress and rest perfusion when performed; quantification and post-processing	Primary or companion cardiac MR service that includes perfusion imaging; `0899T` augments these datasets with AI-derived absolute MBF.
`75561`	Magnetic resonance, cardiac, with pharmacologic stress perfusion, including interpretation and reporting	Core stress CMR perfusion acquisition and interpretation; `0899T` is an add-on analytic service applied to perfusion data from codes like `75561`.
`0143T`	Myocardial 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.
`76377`	3D 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.
`96040`	Medical transcription service, review and correction (non-physician) (example ancillary)	Ancillary documentation and report preparation services that may support finalized reports containing AQMBF results.

CPT 0900T: AI Quantitation of Myocardial Blood Flow

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Jul 29, 2026.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.

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Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when work required to interpret or document the AI-derived AQMBF is substantially greater than usual.
`26`	Professional component	Use when reporting the physician interpretation portion separate from technical imaging acquisition.
`52`	Reduced services	Use if the AI analysis is partially completed or limited and billed at reduced service.
`53`	Discontinued procedure	Use if the AI processing or imaging acquisition is terminated due to patient instability before completion.
`62`	Two surgeons	Rare; use when two qualified physicians jointly perform the interpretation as required by local policy.
`73`	Discontinued outpatient procedure prior to anesthesia	Use when the outpatient imaging session is terminated prior to planned stress administration and AI analysis is not completed.
`78`	Unplanned return to operating/procedure room following initial procedure	Use when an unplanned repeat imaging procedure requiring repeat AI analysis occurs during the postoperative period.
`TC`	Technical component	Use when billing only the technical component of the combined service; note `0899T` is an add-on analytic service and TC may apply if reporting technical-only services in composite reporting.

Taxonomy Code	Specialty	Notes
207RC0000X	Adult Cardiology	Interpreting cardiologists typically order and review stress CMR and AQMBF analyses.
2084P0800X	Diagnostic Radiology	Radiologists with cardiac MRI expertise perform acquisition and interpretation.
261QM0800X	Cardiac Electrophysiology	Electrophysiologists may utilize perfusion quantification when evaluating ischemic substrates.
174400000X	Nuclear Cardiology	Nuclear cardiologists may correlate PET perfusion quantitation with CMR AQMBF results.
2086S0122X	Cardiac MRI Specialist	Advanced imaging physicians who perform specialized post-processing and interpretation.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
Data not available in the input.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`75557`	Magnetic resonance angiography, heart, with contrast, including stress and rest perfusion when performed; quantification and post-processing	Primary or companion cardiac MR service that includes perfusion imaging; `0899T` augments these datasets with AI-derived absolute MBF.
`75561`	Magnetic resonance, cardiac, with pharmacologic stress perfusion, including interpretation and reporting	Core stress CMR perfusion acquisition and interpretation; `0899T` is an add-on analytic service applied to perfusion data from codes like `75561`.
`0143T`	Myocardial 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.
`76377`	3D 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.
`96040`	Medical transcription service, review and correction (non-physician) (example ancillary)	Ancillary documentation and report preparation services that may support finalized reports containing AQMBF results.

CPT 0900T: AI Quantitation of Myocardial Blood Flow

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Jul 29, 2026.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.

Published by

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CPT 0899T: AI Quantitation of Myocardial Blood Flow

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Billing Code Overview

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Billing Code Overview

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References