AHA Coding Clinic® for ICD-10-CM and ICD-10-PCS - 2021 Issue 3; Ask the Editor

Non-ST Elevated Myocardial Infarction due to Coronary Artery Disease and In-Stent Restenosis

A patient was admitted secondary to an acute non-ST elevated myocardial infarction (NSTEMI) and underwent percutaneous coronary intervention. During the intervention, the previously placed stent in the right coronary artery (RCA) was dilated with a balloon. The distal marginal branch of the circumflex artery was then dilated and stented. The provider documented, “Severe two-vessel disease of the circumflex artery and RCA in-stent stenosis, NSTEMI due to native CAD and in-stent restenosis of the RCA.” Since ICD-10-CM classifies a NSTEMI due to CAD and an NSTEMI due to in-stent restenosis differently, is it appropriate to assign two codes to show both sources of the NSTEMI in this case? ...

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