Cardiology Coding Alert

Reader Question:

Factor Modifier 52 Into iFR Reporting

Question: Should I use an unlisted code or +93571 for iFR (Instant Wave-Free Ratio)?

California Subscriber

Answer: You should use +93571 (Intravascular Doppler velocity and/or pressure derived coronary flow reserve measurement [coronary vessel or graft] during coronary angiography including pharmacologically induced stress; initial vessel [List separately in addition to code for primary procedure]).

For each vessel after the first, use +93572 (...each additional vessel [List separately in addition to code for primary procedure]).

You should append modifier 52 (Reduced services) because while iFR largely meets the service described in the code descriptors, it does not involve the "pharmacologically induced stress" listed in +93571 and +93572, according to the December 2015 CPT® Assistant.

The American College of Cardiology and the Society for Cardiovascular Angiography and Interventions make the same recommendation in a letter posted at www.volcanocorp.com/products/pdf-files/ACC-SCAI-Recommendation-Letter-for-iFR-CPT-Coding.pdf.

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