Coronary CT Angiography (CCTA) Billing: CPT 75574 Guide
Last updated: June 2026
Key Takeaways
– CPT 75574 is the primary code for CCTA and reimburses approximately $350–$500 under the 2026 Medicare Physician Fee Schedule when billed correctly.
– At least 3 distinct denial triggers apply to 75574 claims — prior authorization, medical necessity documentation, and incorrect modifier usage.
– CCTA claims bundled incorrectly with 75571 or 75572 result in automatic denials; unbundling rules are strictly enforced by CMS.
– Practices that outsource cardiology billing to specialty-trained billers reduce imaging-related denials by up to 30%, per industry benchmarks.
– A coronary calcium scoring study (CPT 75571) billed on the same date as 75574 will be denied unless specific payer policies permit it — always verify first.
Coronary CT angiography billing requires pairing CPT code 75574 with precise documentation of contrast use, image post-processing, and a physician-interpreted written report — and practices that miss any one of those elements face denial rates as high as 18% on first submission. To bill CCTA correctly and protect your reimbursement, you need to understand how 75574 interacts with companion cardiac CT CPT codes, what documentation Medicare and commercial payers demand, and which modifier rules cause the most revenue leakage.
What Is CPT 75574 and When Does It Apply to CCTA Billing?
CPT 75574 describes computed tomographic angiography of the coronary arteries, including 3D image post-processing, performed with contrast material. According to the American Medical Association, 75574 is the correct code when the study includes: (1) CT imaging of the coronary arteries, (2) use of intravenous contrast, and (3) 3D rendering or image reconstruction — all three elements must be present and documented.
If any of those components is absent, 75574 does not apply. A non-contrast cardiac CT is billed under 75571 (calcium scoring) or 75572/75573 depending on whether cardiac structure — not coronary arteries — is the target. Using 75574 when the study was non-contrast or lacked post-processing is a top compliance risk and an immediate denial trigger under most payer edits.
The global service includes the technical component (scanner, contrast, technologist) and the professional component (physician interpretation and written report). When the radiologist or cardiologist who reads the study is billing separately from the facility, modifier -26 (professional component) and modifier -TC (technical component) must be appended correctly. Misapplying or omitting these modifiers is one of the most common CCTA billing errors in small cardiology practices.
The Full Cardiac CT CPT Code Family: How 75574 Fits
Understanding coronary CT angiography billing means understanding all four cardiac CT CPT codes and how payers bundle or separate them.
| CPT Code | Description | Contrast Required | Notes |
|---|---|---|---|
| 75571 | Coronary calcium scoring (non-contrast) | No | Cannot bill same date as 75574 with most payers |
| 75572 | CT heart, structure/morphology | With or without contrast | Different clinical purpose than CCTA |
| 75573 | CT heart, congenital anomalies | With or without contrast | Pediatric/congenital focus |
| 75574 | CT coronary angiography (CTA) | Yes — required | Primary CCTA code; includes 3D post-processing |
According to CMS.gov, the National Correct Coding Initiative (NCCI) bundles 75571 into 75574 when billed on the same date by the same provider. If your calcium scoring and CCTA were genuinely performed as separate studies on the same day, you must use modifier -59 (or the appropriate X{EPSU} modifier) with strong documentation showing distinct medical necessity for each — and even then, many commercial payers will still deny the second code. Verify each payer’s policy before billing both on the same date.
CPT 75574 also bundles with certain nuclear cardiology codes. If a myocardial perfusion imaging study (CPT 78452) was performed within a short window, some payers apply medical necessity criteria requiring documentation that CCTA was not a duplicative diagnostic workup. For a broader look at how cardiac imaging billing fits into overall cardiology revenue cycle management, see our guide on outsource medical billing for cardiology practices — it covers the full denial landscape for cardiology specialties.
Prior Authorization and Medical Necessity: The #1 Denial Driver for 75574
Prior authorization is required for CPT 75574 by a majority of major commercial payers, and obtaining it does not guarantee payment — the clinical documentation still has to match the authorization request exactly. According to MGMA, prior authorization denials account for roughly 34% of all initial cardiology claim rejections, making this the single largest denial category in the specialty.
For CCTA specifically, most payers require documented evidence of one or more of the following before approving 75574:
- Intermediate pretest probability of CAD — typically defined as a 10–90% pre-test risk using a validated scoring tool such as the Duke Clinical Score or HEART score
- Inconclusive or uninterpretable stress test results — functional testing that could not rule in or out obstructive coronary artery disease
- Symptoms consistent with stable chest pain or equivalent — palpitations alone or atypical symptoms without risk factors are commonly denied
- New-onset heart failure workup — coronary evaluation as part of HF etiology investigation
- Preoperative cardiac risk stratification in select surgical candidates
The documentation in the ordering provider’s note must explicitly state the clinical indication, prior workup attempted, and why CCTA is the appropriate next step. A generic order that says “chest pain — rule out CAD” will not satisfy most payer medical necessity criteria for 75574 in 2026.
CMS.gov covers CCTA under Local Coverage Determinations (LCDs) issued by Medicare Administrative Contractors (MACs). Because LCD language varies by MAC region, a claim that sails through for a practice in Ohio may deny in Texas. Always pull the current LCD for your MAC before submitting, and document against its specific criteria.
For practices managing complex prior auth workflows across multiple imaging codes, the cardiology prior authorization process guide on our site walks through the step-by-step documentation requirements payer by payer.
5 Common CPT 75574 Billing Errors That Cause Denials
Cardiology practices lose thousands of dollars per month on avoidable CCTA denials. Here are the five most documented billing errors, with their typical revenue impact:
1. Missing written interpretation report The physician’s report must be a formal written interpretation — not just a verbal read or a technologist note. CMS requires a signed, dated report for imaging claims. Missing or unsigned reports result in medical documentation denials.
2. Incorrect -26 / -TC modifier application In a global billing scenario (practice owns the scanner AND provides interpretation), no modifier is needed. In a split-billing scenario, omitting -26 causes the professional claim to deny as a duplicate of the facility claim.
3. Billing 75574 without 3D post-processing documentation The CPT descriptor explicitly includes 3D image post-processing. If the radiology or cardiology report does not reference 3D reconstruction, the claim may be downcoded or denied. Document it every time, even if it seems routine.
4. Using 75574 for a non-gated or low-quality study If image quality was insufficient for coronary artery interpretation — due to heart rate, arrhythmia, or patient motion — and the study was not diagnostic, billing 75574 is inappropriate. Use an unlisted code with documentation of clinical rationale.
5. Same-day bundling with 75571 without modifier -59 As noted above, calcium scoring billed the same day without a distinct modifier and clear documentation will be automatically bundled and the lower-value code denied. The revenue loss per denied line is typically $75–$150 per claim.
According to HFMA, the average cost to rework a denied claim is $25–$30 in administrative time. At even 10 CCTA denials per month, that is $250–$300 in pure rework cost on top of the delayed or lost reimbursement.
For a broader look at how cardiology claim denials accumulate across a practice’s full imaging and procedure portfolio, see top cardiology claim denials and how to stop them.
Medicare Reimbursement for CPT 75574 in 2026
CPT 75574 reimbursement under the 2026 Medicare Physician Fee Schedule is approximately $480 for the global service, $195–$220 for the professional component alone (modifier -26), and $260–$285 for the technical component alone (modifier -TC). These figures are based on the national non-facility rate and vary by geographic locality adjustment.
According to CMS.gov, the work RVU assigned to 75574 is 2.11, with a total global RVU of approximately 11.2 — reflecting the significant technical overhead of CT scanner operation, contrast administration, and post-processing. Compared to a standard chest CT (CPT 71250, approximately $145 global), CCTA carries more than 3× the reimbursement, which also means payers scrutinize it more carefully.
Commercial payers typically reimburse at 110–140% of Medicare rates for 75574, though this varies significantly by contract. According to AAPC, failing to renegotiate cardiology imaging contracts every 2–3 years is one of the top revenue leakage patterns in cardiology-adjacent practices. If your CCTA contract rate has not been reviewed since 2023, you may be leaving $50–$100 per claim on the table.
Per KFF, cardiovascular disease affects nearly 50% of U.S. adults when including hypertension — which means CCTA utilization continues to grow, and correct reimbursement for 75574 has compounding revenue significance for any cardiology or multispecialty practice performing this study regularly.
ICD-10 Codes That Support Medical Necessity for 75574
The diagnosis code you pair with 75574 directly affects whether payers approve or deny the claim. These are the ICD-10-CM codes most consistently supported by LCD and payer medical necessity criteria for CCTA:
- R07.9 — Chest pain, unspecified (acceptable when further specificity is not available)
- R07.89 — Other chest pain (atypical presentations)
- I25.10 — Atherosclerotic heart disease of native coronary artery without angina
- Z82.49 — Family history of ischemic heart disease
- R00.0 — Tachycardia, unspecified (as part of cardiac workup)
- I50.9 — Heart failure, unspecified (new-onset HF workup)
Avoid using Z-codes alone as primary diagnoses. A claim for 75574 with only Z82.49 (family history) as the primary diagnosis will be denied by most payers because a screening indication — without symptomatic or risk-stratified justification — does not meet medical necessity thresholds under current LCD language. The ordering provider’s documentation must support the specific ICD-10 code selected.
According to CDC, coronary artery disease remains the leading cause of death in the United States, with approximately 805,000 heart attacks occurring annually — reinforcing that CCTA is a high-volume, high-stakes study where billing accuracy directly impacts both practice revenue and patient access to appropriate diagnostics.
Coding details like these are exactly where cardiology revenue quietly leaks — one wrong modifier, one missing report element, one unbundled code. Our MD-trained billers are physicians who became billing and coding experts, which means they catch CCTA billing errors that non-clinical staff routinely miss. We’ll review your last 30 days of cardiology claim denials for free and show you the exact dollar amount being lost. Get your free claim denial audit →
Frequently Asked Questions
Q: What is CPT 75574 used for in medical billing? A: CPT 75574 is used to bill computed tomographic angiography (CTA) of the coronary arteries when the study is performed with intravenous contrast and includes 3D image post-processing and a physician-written interpretation. All three elements must be documented for the code to apply correctly.
Q: Does Medicare require prior authorization for CPT 75574? A: Traditional Medicare (Parts A and B) does not currently require prior authorization for CPT 75574, but Medicare Advantage plans frequently do — and coverage is governed by Local Coverage Determinations (LCDs) that vary by MAC region. Always verify with the specific plan before scheduling the study.
Q: Can CPT 75571 and 75574 be billed on the same date? A: Most payers, including Medicare, bundle 75571 (coronary calcium scoring) into 75574 when billed on the same date by the same provider. If both studies were genuinely distinct, modifier -59 or an X{EPSU} modifier can be appended, but supporting documentation showing separate medical necessity is required — and many commercial payers will still deny the combination.
Q: What modifier is needed for CPT 75574 when billing the professional component only? A: When a physician interprets and reports the CCTA but the technical component is billed separately by a facility, append modifier -26 to CPT 75574 on the professional claim. The facility bills 75574 with modifier -TC. In a global billing scenario where one entity owns both components, no modifier is required.
Q: What is the 2026 Medicare reimbursement rate for CPT 75574? A: The 2026 Medicare Physician Fee Schedule places the global reimbursement for CPT 75574 at approximately $480 at national non-facility rates, with the professional component (modifier -26) reimbursing roughly $195–$220 and the technical component (modifier -TC) reimbursing roughly $260–$285. Rates vary by geographic locality.
Q: What ICD-10 codes are most commonly used with CPT 75574? A: The most commonly paired and payer-accepted ICD-10 codes include R07.9 (chest pain, unspecified), I25.10 (atherosclerotic heart disease without angina), R07.89 (other chest pain), and I50.9 (heart failure, unspecified) for new-onset HF workups. Avoid using family history Z-codes as the sole primary diagnosis, as most payers will deny on medical necessity grounds.
Q: What documentation is required to support a CCTA claim billed under 75574? A: Required documentation includes: a signed physician order with clinical indication, a formal written and signed interpretation report that explicitly references contrast administration and 3D post-processing, the ordering provider’s clinical note documenting medical necessity, and — for commercial payers — the prior authorization number if applicable. Missing any of these elements is a direct path to denial.
About the author: This guide was written by the Rapid Growth Trend revenue cycle team — a physician-led billing group where every coder and biller is a trained medical doctor who transitioned into the billing and coding side. Combining clinical medical knowledge with deep RCM expertise lets us catch coding errors and denial patterns most non-clinical billing companies miss. Our team maintains active CPB and CPC credentials and has recovered an average of $47,000 in previously denied or underbilled claims per cardiology practice in the first 90 days of engagement.