FFR-CT Reimbursement Guide: CPT 75580 Billing for Hospital Cardiology Departments

For hospital cardiology billing departments, few codes represent a cleaner opportunity than CPT 75580. Permanent Medicare reimbursement (CPT 75580) was established in 2024, payer acceptance now exceeds 89%, and the clinical evidence behind FFR-CT is solid enough to withstand medical necessity audits. What billing teams often lack is a practical guide to the end-to-end workflow—from referral to remittance. This post fills that gap.

What Is CPT 75580?

CPT 75580 covers coronary artery CTA analysis with fractional flow reserve (FFR). Specifically, it applies when a coronary CT angiography (CTA) study is analyzed using machine-learning software to calculate hemodynamic significance of coronary stenoses—expressed as a fractional flow reserve value per vessel.

The analysis is additive to the coronary CTA itself (CPT 75574) and is billed separately on the same claim or as a standalone when the CTA was performed at an outside facility. Key eligibility criteria:

• Indication: Intermediate-probability suspected CAD where functional significance of stenosis is being evaluated
• Source study: Existing coronary CTA with adequate image quality (≥64-slice scanner)
• Software requirement: FDA-cleared FFR-CT analysis platform
• Report documentation: Per-vessel FFR values and interpretation by a qualified physician

Medicare Reimbursement Rate and Payer Landscape

The national Medicare non-facility reimbursement for CPT 75580 is $1,017 per analysis (Based on 2024 CMS Physician Fee Schedule. Rates subject to annual revision.). Facility rates vary by geographic adjustment. Commercial payers cluster in the $950–$1,100 range, with some regional plans exceeding $1,200.

How It Compares to Invasive Catheterization

Procedure	CPT Code	Medicare Rate	Avg. Facility Cost	Patient Risk
FFR-CT Analysis	75580	$1,017	$8–12K (software license)	None (non-invasive)
Diagnostic Cath (with FFR)	93458 + 93571	$2,800–$3,400	$15,000–$22,000	0.1–0.5% major complications
Coronary CTA (standalone)	75574	$382	CT scanner overhead	None
CTA + FFR-CT (combined)	75574 + 75580	$1,399	Same CT + software license	None

The math is compelling for CFOs: a combined CTA + FFR-CT study reimburses $1,399 non-invasively versus $2,800–$3,400 for diagnostic catheterization—with zero procedural risk, shorter room utilization, and dramatically lower malpractice exposure.

Payer Acceptance Landscape

As of 2025, 89% of major U.S. payers have established coverage policies for CPT 75580. This includes Medicare, most Blue Cross Blue Shield regional plans, Aetna, Cigna, UnitedHealthcare, and Humana. The remaining 11% are primarily small regional plans and Medicaid programs in states that have not yet issued coverage determinations.

For billing departments managing payer-specific workflows, the practical implication is that prior authorization is not typically required when medical necessity is established in the clinical note. Payers that have not yet established coverage can often be handled via peer-to-peer review using CREDENCE trial data.

Billing Workflow: Referral to Remittance

A complete CPT 75580 billing cycle from the billing department's perspective:

1. Referral documentation: Ordering physician documents intermediate-probability CAD with ICD-10 codes I25.10 (atherosclerotic heart disease, unspecified) or R07.9 (chest pain, unspecified) plus clinical rationale for non-invasive functional assessment.
2. CCTA scan acquisition: Patient undergoes coronary CTA (CPT 75574) on ≥64-slice CT scanner. Radiology generates structured report and DICOM images in PACS.
3. FFR-CT analysis order: Radiologist or cardiologist routes CTA DICOM study to FDA-cleared FFR-CT software platform via DICOM push or HL7 order. This step generates the CPT 75580 billable event.
4. AI analysis completion: FFR-CT software completes analysis (typically 15–45 minutes). Per-vessel FFR values returned as structured report and DICOM overlay.
5. Physician interpretation and report signing: Cardiologist reviews FFR values and co-signs report. This signed interpretation is the medical necessity documentation for CPT 75580—preserve it in the patient record and attach to the claim.
6. Claim submission: Submit CPT 75580 with:
   • ICD-10 primary diagnosis code (I25.10 or R07.9)
   • Date of service = date of FFR-CT analysis
   • Place of service: 22 (outpatient hospital) or 11 (office)
   • Ordering physician NPI in box 17
   • Modifier -26 if billing professional component only
7. Remittance and denial management: Expected payment within 30–45 days for Medicare. Commercial payers vary. Denials most commonly cite "investigational"—resolved by submitting FDA clearance documentation and CREDENCE trial citation. First-pass denial rate under 5% at high-volume programs.

Revenue Modeling: 5, 10, and 20 Cases Per Week

For department heads and CFOs evaluating program ROI, here are conservative annual projections at three volume tiers assuming $1,017 average reimbursement and 85% collection rate (accounts for patient responsibility, payer mix, and denials):

Weekly Volume	Annual Cases	Gross Revenue	Net Collections (85%)	Software License Cost	Net Annual Margin
5 cases / week	260	$264,420	$224,757	~$30,000	~$195,000
10 cases / week	520	$528,840	$449,514	~$45,000	~$405,000
20 cases / week	1,040	$1,057,680	$899,028	~$60,000	~$839,000

A 200-bed community hospital doing 10 FFR-CT cases per week generates roughly $405,000 net annually after software costs—with zero capital equipment depreciation, no additional radiology staff, and no cath lab time consumed.

How a Software-Only Model Simplifies the Billing Path

Traditional FFR-CT deployment required purchasing a vendor's proprietary hardware and software bundle—creating capital depreciation entries, facility fee complexity, and vendor-specific billing workflows that differed by platform. A software-only model eliminates these complications:

• No capital depreciation: Software licenses are operating expenses, not capital assets. Billing departments do not need to reconcile depreciation schedules with reimbursement.
• No facility fee ambiguity: Software-only analysis billed under physician fee schedule rules (CPT 75580) rather than facility fee structures—cleaner claim submission and more predictable reimbursement.
• Vendor-agnostic workflow: Software that accepts DICOM from any CT scanner integrates into existing billing workflows without platform-specific adaptations.
• Faster program launch: 2–4 week integration vs. 6–12 months for hardware-dependent deployments. Revenue starts sooner; ROI timeline compresses.

For billing departments that have struggled with cardiology technology deployments that required costly hardware support contracts and generated facility-fee disputes with payers, the software-only model is a structural improvement—not just a cost reduction.

Common Billing Pitfalls and How to Avoid Them

Departments new to CPT 75580 encounter predictable issues in the first 90 days:

• Missing physician co-signature on FFR-CT report. The analysis software generates results, but the billable event requires a qualified physician (cardiologist or radiologist with cardiovascular imaging privilege) to sign the interpretation. Pre-authorization workflows should enforce this before claim submission.
• Bundling errors. Some coders incorrectly bundle CPT 75580 into the facility fee for the coronary CTA. These are separately billable on the same or different date of service. Use modifier -59 if submitting both on the same claim to indicate distinct procedural services.
• "Investigational" denials. A subset of payers—particularly smaller regional plans—auto-deny FFR-CT claims using outdated policy language. The response: submit FDA 510(k) clearance documentation (K192073 for HeartFlow FFRCT), CREDENCE trial abstract, and current CMS coverage policy. Escalate to peer-to-peer if denied twice.
• Incomplete medical necessity documentation. Claims need more than an ICD-10 code. The clinical note must document intermediate-probability CAD, prior non-diagnostic workup (if applicable), and clinical rationale for non-invasive functional assessment vs. diagnostic catheterization.

The CFO Summary

FFR-CT under CPT 75580 is not a marginal revenue line—it is a structurally profitable cardiology service that:

• Generates $195K–$839K annual net margin at 5–20 cases/week
• Requires zero capital expenditure under a software-only model
• Has established Medicare reimbursement and 89% commercial payer acceptance
• Reduces invasive procedure volume—lowering malpractice exposure and cath lab overhead
• Differentiates your cardiology program in regional referral competition

The clinical evidence is settled (CREDENCE trial, NXT trial). The reimbursement path is clear. The remaining question for hospital leadership is execution—specifically, whether the implementation and billing workflow is built for volume. That's where the choice of software platform matters.

References

• CMS Physician Fee Schedule 2024 — CPT 75580 permanent reimbursement rate. Final rule published November 2023.
• CREDENCE Trial (2021) — Götberg et al., Eur Heart J. Diagnostic accuracy of FFR-CT vs. invasive FFR, n=399.
• NXT Trial (2014) — Nørgaard et al., JACC. Diagnostic performance of FFR-CT as gatekeeper prior to invasive coronary angiography.
• FDA 510(k) K192073 — HeartFlow FFRCT analysis software. FDA clearance for coronary CTA-derived FFR.
• CardiaX Intelligence Platform (2026) — AI operating system for multi-modality cardiac diagnostics.