Coronary art/grft angio s&i
CPT 93455 covers the supervision and interpretation of imaging during coronary angiography of native arteries or bypass grafts. This is the radiological component where a physician reviews and interprets X-ray images of the heart's blood vessels taken during a catheterization procedure.
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
Conversion factor: 32.3465 · Source: CMS MPFS RVU25A · Confidence: High
NCCI bundling edits
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Billing tips
Always verify this is being billed for S&I only, not bundled with the catheterization procedure codes (93454-93461 series)
Impact: Prevents $933.20 denial; 93455 is included in comprehensive catheterization codes and should only be reported when performing S&I separately
Document all vessels imaged including native coronary arteries and specific bypass grafts (LIMA, RIMA, SVG) with separate dictated interpretation
Impact: Supports medical necessity and prevents downcoding; incomplete documentation causes 15-20% of denials
Bill 93455 only when performing supervision of imaging acquisition plus interpretation; do not report if only reading images acquired by another physician
Impact: Ensures compliance with supervision requirements; improper billing risks $933.20 overpayment recovery plus penalties
For procedures in facility settings, verify the hospital is not also billing for the technical component to avoid duplicate billing
Impact: Prevents compliance issues; both facility and professional rates are $933.20, indicating this is professional-only component
When performed with intervention codes (92920-92944), verify payer-specific bundling rules as some payers include diagnostic angiography
Impact: Modifier 59 may be required to receive separate payment; failure to append can result in $933.20 bundled denial
Ensure separate documentation timestamp for interpretation distinct from the procedure note to support separate reporting
Impact: Strengthens audit defense; lack of separate interpretation report is a top 3 audit finding resulting in recoupment
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