Cardiology Coding Alert


1 93556 Unit Covers All Services

Question: My cardiologist has been billing two units of 93556, but Medicare denies the claim with an invalid billing error. Are there billing guidelines that say you can't report two units?

Hawaii Subscriber

Answer: AMA's CPT Assistant (Spring 1994) states that you should report 93556 (Imaging supervision, interpretation and report for injection procedure[s] during cardiac catheterization; pulmonary angiography, aortography, and/or selective coronary angiography including venous bypass grafts and arterial conduits [whether native or used in bypass]) once for all services the descriptor indicates.

You use 93556 to "describe the supervision and interpretation of pulmonary angiograms, aortograms and/or selective coronary angiograms, including vein graft angiograms and imaging of the internal mammary arteries, whether used as a coronary graft or not," per CPT Assistant.

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