CPT 93459Cardiology

L hrt art/grft angio

CPT 93459 covers left heart catheterization combined with coronary artery bypass graft angiography, a diagnostic procedure where doctors thread a thin tube through blood vessels to examine the heart's left chambers and previously placed bypass grafts.

Showing rates for

National Average

Base Medicare rate

$1,036.71

This calculator gives a typical-case estimate using standard Medicare modifier rules. Actual payment depends on payer policies, documentation, code-specific CMS status indicators, and locality. Verify before billing.

RVU breakdown

Work RVU

6.35

PE RVU (NF)

24.47

MP RVU

1.23

Total RVU

32.05

Conversion factor: 32.3465 · Source: CMS MPFS RVU25A · Confidence: High

NCCI bundling edits

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Billing tips

Document all grafts visualized individually (LIMA, RIMA, SVG to specific territories) and native vessels examined to justify comprehensive angiography component
Impact: Prevents downcoding to 93458 (without graft angiography) which pays significantly less; protects full $1,036.71 reimbursement
Verify presence of prior CABG surgery in patient history before billing 93459; without documented bypass grafts, use 93458 instead
Impact: Avoids automatic denials and recoupment audits; incorrect code selection is a top OIG target for cardiac catheterization billing
Separately report add-on codes for right heart catheterization (93453), intravascular ultrasound (93572), or fractional flow reserve (93571) when performed and documented
Impact: Can add $100-$400 in additional reimbursement per procedure when medically indicated and properly documented
Ensure contrast type, volume, and arterial access site are documented; these are required elements for cardiac catheterization procedures
Impact: Missing documentation elements trigger medical necessity denials and recovery audit contractor (RAC) activity; high audit risk given 32.05 total RVUs
Code selection depends on combination of services: native vessels alone (93455), grafts alone (93457), or both natives and grafts (93459); verify all components documented
Impact: Incorrect code selection in this family can result in underpayment of $200-$400 or overpayment triggering recoupment
Bill facility and non-facility settings identically for 93459 as both reimburse at $1,036.71; ensure place of service matches actual location (hospital=21, ASC=24)

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Frequently asked questions

What is the Medicare reimbursement rate for CPT code 93459 in 2025?

The 2025 Medicare national average payment for CPT 93459 is $1,036.71 for both facility and non-facility settings. This rate is based on 32.05 total RVUs (6.35 work RVU, 24.47 PE RVU, 1.23 MP RVU) multiplied by the 2025 conversion factor of 32.3465. Actual payment may vary by geographic locality based on the GPCI adjustment factors.

What is the difference between CPT 93459 and 93458?

CPT 93459 includes left heart catheterization with angiography of both native coronary arteries AND bypass grafts, used only in patients with prior CABG surgery. CPT 93458 covers left heart catheterization with coronary angiography of native vessels only, without graft assessment. Using 93459 requires documented history of bypass surgery and visualization of the grafts during the procedure.

Can CPT 93459 be billed with PCI codes on the same day?

Generally, no. When PCI is planned, diagnostic catheterization is considered bundled and not separately payable. However, 93459 may be separately billable with modifier 59 if a full diagnostic study was performed, medical decision-making occurred based on those findings, and PCI was then undertaken based on unexpected findings. Documentation must clearly support that the diagnostic study was distinct from the pre-intervention imaging.

How many RVUs is CPT code 93459 worth?

CPT 93459 has a total of 32.05 RVUs in 2025, consisting of 6.35 work RVUs, 24.47 practice expense RVUs (both facility and non-facility), and 1.23 malpractice RVUs. This relatively high RVU value reflects the complexity and physician work involved in comprehensive left heart catheterization with bypass graft assessment.

What documentation is required to bill CPT 93459?

Required documentation includes: documented history of prior CABG surgery with graft details, clinical indication for the procedure, arterial access details, description of all native coronary arteries visualized, individual documentation of each bypass graft engaged and assessed, left ventriculography findings if performed, hemodynamic measurements, contrast type and volume, fluoroscopy time, and a complete interpretation report with findings and recommendations.

Who can bill CPT code 93459?

CPT 93459 is typically billed by interventional or invasive cardiologists who are board-certified in cardiovascular disease with specific training in cardiac catheterization procedures. Cardiothoracic surgeons performing diagnostic catheterization may also bill this code. Physicians must have hospital privileges and credentialing for invasive cardiac catheterization procedures to perform and bill this service.

What are common denial reasons for CPT 93459?

Common denials include: lack of documented medical necessity (missing symptoms or non-invasive test results), incorrect code selection (billing 93459 without documented graft visualization or CABG history), bundling with PCI procedures performed the same day, frequency limitations (repeat catheterization too soon without clinical justification), and inadequate documentation of required procedural elements such as specific grafts visualized or hemodynamic data.