CPT Code 75574: Cardiac CT Angiography Billing Guide

Key Takeaways

CPT code 75574 covers computed tomographic angiography of the heart, coronary arteries, and bypass grafts with contrast and 3D postprocessing.

75574 includes calcium scoring when performed at the same session (per CPT codebook: cardiac CT/CTA codes 75572-75574 include calcium scoring if performed). CPT 75571 is only reportable as a stand-alone calcium scoring study on a separate encounter.

Medicare covers 75574 for specific ICD-10 diagnoses per Palmetto GBA’s Local Coverage Article A56691 (MAC-jurisdiction-specific; billers in non-Palmetto jurisdictions should check their MAC’s equivalent article via the CMS Medicare Coverage Database); prior authorization requirements vary by commercial payer.

Pabau’s claims management software helps cardiology and radiology billing teams track modifier usage, payer rules, and documentation compliance for complex imaging codes.

Cardiac CT claim denials for CPT code 75574 often come down to the same handful of avoidable problems: wrong modifier, missing documentation of 3D postprocessing, or a non-covered ICD-10 pairing. For radiology coders and cardiology billing staff managing high-volume coronary CTA workflows, getting these details right on the first submission is the difference between clean payment and a costly appeals cycle. This reference covers the full descriptor, clinical indications, modifier rules, Medicare and commercial payer coverage, ICD-10 pairings, and documentation standards for CPT code 75574.

According to the American Medical Association (AMA), CPT codes are maintained and updated annually by the CPT Editorial Panel. For complex cardiac imaging codes like the 75571-75574 family, understanding both the official descriptor and payer-specific coverage policies is essential before submission. This guide also addresses the 2024 CMS OPPS revenue code correction that affected 75574 claims at hospital outpatient facilities, and the relationship between 75574 and the FFR-CT Category III add-on codes.

CPT Code 75574: Definition and Clinical Description

CPT code 75574 is classified under Diagnostic Radiology Procedures of the Heart. The official AMA descriptor reads: Computed tomographic angiography, heart, coronary arteries and bypass grafts (when present), with contrast material, including 3D image postprocessing (including evaluation of cardiac structure and morphology, assessment of cardiac function, and evaluation of venous structures, if performed).

Several components of this descriptor carry significant coding implications. “Bypass grafts (when present)” means 75574 is the correct code whether or not the patient has prior bypass grafts. There is no separate code for graft evaluation; it is bundled. “With contrast material” is a hard requirement. If no contrast is administered, 75574 does not apply. The “3D image postprocessing” language means the imaging professional must document that multiplanar reconstruction or volumetric rendering was performed, not just that axial images were acquired.

Clinically, CPT code 75574 is used for coronary CT angiography (CCTA) to evaluate suspected or known coronary artery disease (CAD), assess coronary anatomy before structural interventions such as TAVR, and examine bypass graft patency in post-surgical patients. The importance of accurate diagnosis coding extends across specialties, and cardiac imaging is no exception: appropriate ICD-10 pairing is a primary driver of Medicare coverage determination for 75574.

What 75574 Does Not Include

Two common misconceptions lead to incorrect billing. First, CPT code 75574 includes calcium scoring when performed at the same session (per CPT guidelines, codes 75572-75574 bundle calcium assessment). The Society of Cardiovascular Computed Tomography (SCCT) is clear that CPT 75571 is the standalone calcium scoring code; when both are performed at the same session, both may be reported. Second, codes 0623T-0626T (coronary plaque analysis, deleted 2026)). These codes were deleted effective January 1, 2026 and replaced by new Category I code 75577 for coronary plaque assessment. Per the December 2021 ASNR/NCCI letter to CMS, FFR-CT analysis is not part of the base service described by 75574, meaning these add-ons require separate reporting when applicable and covered.

Code Family: 75571, 75572, 75573, and 75574 Compared

Selecting the right code within the cardiac CT family is where most coding errors originate. The four codes cover a progression from non-contrast calcium scoring through full coronary CTA with structural assessment.

The critical distinction between 75572 and CPT code 75574 is scope. 75572 covers coronary arteries only. 75574 adds bypass graft evaluation, cardiac structural and morphological assessment, cardiac function assessment, and venous structure evaluation. When the clinical indication calls for evaluation beyond coronary arteries alone, 75574 is the correct choice. Reporting 75572 when 75574’s full scope was performed is an undercoding error that leaves reimbursement on the table. Conversely, reporting 75574 when only coronary artery imaging was performed and documented constitutes overcoding.

Modifiers, Place of Service, and Component Billing

CPT code 75574 is a global code, meaning it bundles both the technical component (equipment, technologist, supplies) and the professional component (physician interpretation). When these services are billed separately, modifiers split the global fee.

• Modifier TC (Technical Component): Appended when the facility bills only for the technical work, typically a hospital outpatient department or freestanding imaging center that does not employ the interpreting physician.
• Modifier 26 (Professional Component): Appended when the radiologist or cardiologist bills only for the interpretation and report, billing independently from the facility.
• Modifier 59 (Distinct Procedural Service): May apply when 75574 is reported alongside another cardiac imaging code on the same date to establish that the services are distinct and not part of the same clinical encounter. Review current NCCI edits before applying; incorrect use of modifier 59 is a compliance risk.
• Modifier 52 (Reduced Services): Relevant in limited scenarios where a technically or clinically complete study was not possible. Document the specific limitation.

Place of Service Considerations

Place of service (POS) code affects both the allowable rate and the revenue code required for facility claims. CPT code 75574 is performed most commonly in hospital outpatient departments (POS 22) and freestanding radiology centers (POS 11 or 19/22 depending on provider-based vs. independent status). A January 2024 CMS OPPS update corrected an outdated revenue code edit that had been blocking or limiting certain hospital outpatient claims for CPT codes 75572, 75573, and 75574, as confirmed by the American College of Radiology (ACR). Facilities that encountered denied or reduced technical component claims before this correction should review whether retrospective adjustments are warranted. Confirm the applicable revenue code alignment with your MAC’s current billing guidance.

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Medicare Coverage and Payer Reimbursement for CPT Code 75574

Medicare covers CPT code 75574 for beneficiaries who meet specific clinical criteria, as defined in CMS Medicare Coverage Article A56691. Coverage is tied to covered ICD-10 diagnosis codes; submitting 75574 without a covered diagnosis results in automatic denial. The most common covered diagnoses include chest pain syndromes, suspected or established coronary artery disease, and specific cardiac structural conditions.

Covered ICD-10 Codes for CPT 75574 (Medicare)

Palmetto GBA Article A56691 lists covered ICD-10-CM codes for the 75571, 75572, and 75574 code family. Representative covered diagnoses include:

• R07.9 Chest pain, unspecified
• R07.89 Other chest pain
• I25.10 Atherosclerotic heart disease of native coronary artery without angina pectoris
• I25.110 Atherosclerotic heart disease of native coronary artery with unstable angina pectoris
• I25.700 Atherosclerosis of coronary artery bypass graft(s), unspecified, without angina pectoris
• Z95.1 Presence of aortocoronary bypass graft
• Q24.5 Malformation of coronary vessels (for congenital indications, typically 75573; confirm applicability)

This list is not exhaustive. Always verify against the current version of Article A56691 before submitting, as CMS updates covered diagnoses periodically. Local Coverage Determinations (LCDs) issued by Medicare Administrative Contractors (MACs) may impose additional restrictions or expand coverage for specific clinical scenarios in your jurisdiction. Consulting the CMS Physician Fee Schedule lookup provides current national payment rates and RVU values for CPT code 75574 by geographic area and facility type.

Reimbursement Benchmarks and Commercial Payers

Medicare reimbursement for CPT code 75574 varies by MAC jurisdiction, facility type, and whether the global, professional, or technical component is billed. Use the FastRVU 2026 RVU lookup to calculate current work RVU, practice expense RVU, and malpractice RVU values for 75574 in your location, as geographic multipliers (GPCI) affect the final allowed amount. For reference, 75574 carries a higher total RVU value than 75572 given its broader clinical scope.

Commercial payer coverage follows CMS broadly but with important differences. TRICARE covers CPT codes 75572 through 75574 for multislice or multidetector CT angiography of the heart, according to Humana Military’s medical policy. Many Blue Cross Blue Shield plans and large commercial insurers require prior authorization for 75574 before the procedure is performed. Failure to obtain required prior authorization is a leading cause of compliance issues in medical office billing. Verify authorization requirements directly with each payer, as policies are updated independently and frequently.

Documentation Requirements for Coronary CTA Claims

Documentation gaps are the second most common reason CPT code 75574 claims are denied after submission. The radiology or cardiology report must support every element of the code descriptor to withstand audit scrutiny.

• Contrast administration: Document the contrast agent used, route of administration, and volume. Non-contrast examinations cannot be billed under 75574.
• 3D image postprocessing: Explicitly state that multiplanar reconstruction, volume rendering, or maximum intensity projection (MIP) images were generated and reviewed. “Axial images reviewed” alone does not satisfy this requirement.
• Coronary artery evaluation: Report findings for each major coronary vessel (LAD, LCX, RCA) and any significant branches. A report that states “coronary arteries not well visualized” without explanation may not support the full code.
• Bypass grafts (when present): If the patient has prior bypass surgery, document graft patency or occlusion for each named graft. The phrase “when present” in the descriptor means grafts must be evaluated and reported when they exist.
• Cardiac structure and morphology: Comment on chamber size, wall motion, valve appearance, and pericardium as applicable.
• Cardiac function assessment: Include ejection fraction or functional assessment when the scan permits, as this is explicitly listed in the descriptor.
• Venous structures: Note pulmonary veins, superior vena cava, and coronary sinus as relevant.

Practices using structured clinical record systems can build report templates that prompt for each required documentation element, reducing dictation omissions and supporting consistent HIPAA-compliant record-keeping across the imaging workflow. The AAPC’s CPT code reference provides additional coding guidelines and crosswalk data that support accurate code selection and documentation alignment.

For TAVR pre-operative assessments where the coronary anatomy is inadequately visualized, note in the report which vessels were not assessable and why. CTA encounters billed as 75574 where the interpreting physician documents that coronary arteries could not be evaluated create audit exposure. Consider whether a lower-level code or an unlisted cardiac CT code better reflects the actual service performed in such cases. Use the CPT coding reference for related procedure codes as a structural guide when navigating adjacent coding families.

Related Cardiac CT and Radiology Codes

Understanding the broader cardiac CT code ecosystem helps coders avoid both undercoding and unbundling violations. These are the most relevant adjacent codes for practices regularly billing CPT code 75574.

• 75571: CT heart without contrast, quantitative coronary calcium evaluation. Report separately from 75574 when calcium scoring is also performed at the same session.
• 75580: Noninvasive estimate of coronary fractional flow reserve (FFR) derived from augmentative software analysis of a coronary CTA data set, with interpretation and report. This is the Category I code for FFR-CT (effective January 1, 2024), used in conjunction with 75574 per CPT parenthetical guidance (report 75580 only once per coronary CTA). It replaced prior Category III FFR-CT codes 0501T-0504T.
• 0623T-0626T (coronary plaque analysis, deleted 2026) analysis. Not bundled with 75574. Limited payer coverage; confirm MAC and commercial payer policies before reporting. These codes require separate documentation of the fractional flow reserve computation.
• 71250/71260/71270: CT thorax codes. Do not substitute thorax CT codes for cardiac CT codes when the clinical intent is coronary evaluation. CMS and payers distinguish these code families.

For practices that also bill across other imaging and procedural specialties, the CPT procedure code library provides additional reference guides for navigating complex multi-code clinical encounters. When multiple cardiac CT codes are reported on the same date, verify current NCCI edits through the CMS fee schedule portal to confirm which code pairs have edit restrictions and whether a modifier is required or prohibited.

Expert Picks

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Looking for a structured approach to clinical documentation compliance? HIPAA Compliance for Medical Offices covers documentation standards and audit-readiness for billing staff.

Need reference for other radiology CPT codes? CPT Procedure Code Guides provide structured reference for adjacent code families and multi-code encounter documentation.

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Conclusion

CPT code 75574 is one of the highest-value cardiac imaging codes in radiology and cardiology billing, and its complexity reflects genuine clinical scope. The most preventable errors, selecting 75572 when 75574 is warranted, omitting 3D postprocessing documentation, and submitting without a covered ICD-10 diagnosis, are each addressable with structured documentation protocols and payer-specific verification workflows.

Pabau’s claims management platform gives cardiology and radiology billing teams the structured workflow support to track modifier rules, payer requirements, and documentation completeness across complex imaging encounters. To see how Pabau handles cardiac imaging billing workflows in practice, book a demo.

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