Unlock Cardiac CT Coding: 75571–75574 – Bundles, Tips, and Pitfalls

Cardiac CT codes 75571–75574 cover non-invasive imaging for coronary calcium scoring, structural evaluation, congenital heart disease, and coronary CTA. Per AMA guidelines, these include pre-contrast axial images, arterial/venous phase sequences (if performed), 2D/3D reformatted images, and quantitative assessments (e.g., coronary stenosis, ventricular volumes, ejection fraction, stroke volume). Function studies and ECG monitoring are bundled—no separate reporting of 93000–93010 or 93040–93042.

Code Descriptions

• 75571: CT, heart, without contrast, with quantitative coronary calcium evaluation.

• 75572: CT, heart, with contrast, for cardiac structure/morphology (includes 3D postprocessing, cardiac function, venous structures if performed). For acquired conditions.

• 75573: CT, heart, with contrast, for structure/morphology in congenital heart disease (includes 3D postprocessing, LV function, RV structure/function, vascular structures if performed). Congenital only—not for mitral prolapse, ectopic coronaries, or bicuspid aortic valve.

• 75574: CT angiography, heart, coronary arteries/bypass grafts (if present), with contrast, including 3D postprocessing (cardiac structure/morphology, function, venous structures if performed).

Key Coding Rules and CCI Guidance

• Report only one heart CT code per encounter (AMA CPT Assistant, July 2010).

• CT + CTA bundling: Report both only if separate studies at the same encounter (rare, must document medical necessity) or different encounters (CCI Chapter 9, D #9).

• 3D rendering (76376/76377): Not separately reportable—bundled in these codes. Requires radiologist’s concurrent supervision (active direction/monitoring). Not for CTA/MRA or bundled studies like cardiac CT.

• Calcium scoring (75571): Inclusive in 75572–75574 if done same encounter—do not report separately.

• Advanced analytics: Use 75580 for FFR from CTA dataset; 75577 for plaque quantification (once per CTA, with 75574 same day). Category III codes 0501T–0504T deleted.

• 3D models/guides: Category III codes 0559T/+0560T (preop) or 0561T/+0562T (intraop).

Practical Tips for Compliance

• Reduced services: Append -52 or use 76380 (limited/localized follow-up).

• Contrast: Bill separately per payer (see Medicare Appendix E); do not bill injection.

• CTA distinction (ACR): Requires angiographic reconstruction/interpretation—otherwise, code as CT.

• Review CPT narratives for bundled 3D in other procedures (e.g., CT colonography, breast MRI).

These rules minimize denials—always tie documentation to code descriptors.

Sample Chart Notes

Compliant documentation must justify the specific code by detailing indication, contrast use, postprocessing, and quantitative findings.

• 75571 (Calcium Scoring): “Non-contrast gated CT heart performed for risk stratification in asymptomatic 55M with family hx CAD. Quantitative coronary calcium score: Agatston 245 (moderate risk). No further structural eval.”​

• 75572 (Acquired Structure Eval): “Contrast-enhanced gated CT heart for dyspnea workup in 62F post-MI. 3D reformats show LV EF 45%, mild aortic root dilation, venous structures normal. Quantitative LV volumes reported.”

• 75573 (Congenital Heart): “Contrast CT heart in 28F with known ASD. 3D postprocessing reveals RV dilation (function preserved), LV normal, vascular baffles intact. No coronary anomalies.”

• 75574 (Coronary CTA): “CTA coronaries/bypass grafts in 70M s/p CABG. 3D images show 70% LAD stenosis, patent LIMA graft, normal cardiac function/EF 55%, venous structures clear.”

Key NCCI Edits

NCCI (CMS Chapter 9, D #9) prevents unbundling; always check PTP edits for modifier 59 eligibility (rare).​

RVU Comparisons (2025 PFS Approx.)

Facility/non-facility RVUs reflect work, PE, MP; total national avg payment ~$100–$400+ (varies by geo/payer). Use for benchmarking.

Pro Tip: Append -26 (prof component) or -TC (tech) as needed; -52 for reduced services. Verify LCDs (e.g., A56691) for ICD-10 coverage like I25.10.

Common ICD-10 codes paired with cardiac CT procedures (CPT 75571–75574) reflect indications like risk stratification, structural evaluation, congenital anomalies, and coronary evaluation. These pairings ensure medical necessity per CMS LCDs (e.g., A56691) and minimize denials—always verify local coverage determinations.​

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Frequent ICD-10 Pairings by CPT Code

Use these high-volume codes based on clinical scenarios; documentation must link to imaging findings.

Coding Tips

• 75571 limitations: Often non-covered for screening; pair with I25.81 (atherosclerosis hx) or Z87.891 (acquired absence CABG) if applicable.​

• Crosswalks: I25.84 (coronary calcification) pairs well with 75571; avoid Z00.6 (routine exam) as it triggers denials.​

• Check payer-specific lists (e.g., CMS A56691 covers A18.84 tuberculosis heart, I11.0 hypertensive heart dz with HF).​

These pairings support ~80% of claims; audit reports for payer trends.

Modifier 26 (Professional Component) and TC (Technical Component) split global radiology codes like cardiac CT 75571–75574 into physician interpretation vs. equipment/staff performance. Use them based on provider type and service split to avoid duplicate billing denials.

Modifier Usage Breakdown

Global codes reimburse fully when one entity handles both components (no modifier). Split billing applies in freestanding centers or purchased services.

Cardiac CT Specifics (75571–75574)

• All are “XXX” global (no assistant surgeon); facility settings rarely need modifiers as hospitals bill technical implicitly.​

• Common split: Emergency depts perform scan (facility TC), teleradiologist reads (-26). Documentation must note supervision/interpretation.

• Pro tips: Never use both -26/-TC on same claim from one provider. Append -59/X{EPSU} for NCCI edits if multiple studies. Verify payer rules (e.g., Medicare assumes TC for hospitals).​

This ensures compliant reimbursement—~30% work RVU shift to -26 vs. full global.

Global billing (no modifiers) captures both professional and technical components of cardiac CT codes like 75571–75574 when one entity performs the full service. Split billing uses -26 (professional only) and -TC (technical only) when components are divided between providers/facilities.​

Global vs. Split Billing: Key Scenarios

Choose based on provider setup, location, and who furnishes equipment/staff vs. interpretation.

Rules for CT Codes (75571–75574)

• PC/TC Indicator “1”: Split eligible—global pays ~full RVU; -26 ~25-30% (work); -TC ~70-75%.​

• Locality matters: Split required across MPFS localities; global OK within same (CMS MPFS rules).

• Prohibited: Same provider can’t bill both -26/-TC same day; no global if purchased interpretations.

• Docs needed: Global requires full service proof; splits need site-specific addresses/NPIs.

  

Global maximizes revenue for integrated practices; splits prevent duplicate claims in hybrid models.