Subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction

**Includes:** - acute myocardial infarction occurring within four weeks (28 days) of a previous acute myocardial infarction, regardless of site - cardiac infarction - coronary (artery) embolism - coronary (artery) occlusion - coronary (artery) rupture - coronary (artery) thrombosis - infarction of heart, myocardium, or ventricle - recurrent myocardial infarction - reinfarction of myocardium - rupture of heart, myocardium, or ventricle - subsequent type 1 myocardial infarction

**Excludes1:** - subsequent myocardial infarction, type 2 (I21.A1) - subsequent myocardial infarction of other type (type 3) (type 4) (type 5) (I21.A9)

**Use additional code:** - code, if applicable, to identify: - exposure to environmental tobacco smoke (Z77.22) - history of tobacco dependence (Z87.891) - occupational exposure to environmental tobacco smoke (Z57.31) - status post administration of tPA (rtPA) in a different facility within the last 24 hours prior to admission to current facility (Z92.82) - tobacco dependence (F17.-) - tobacco use (Z72.0)