I21 - ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction

The ICD 10 Code for ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction is listed as I21.
Additional information concerning this code and description can be found below including ICD 9 crosswalks / GEMS, chapter information, and DRGs where available.

ICD 10 CM Field	Value
Diagnosis Code:	I21
Description:	ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction Includes: cardiac infarction coronary (artery) embolism coronary (artery) occlusion coronary (artery) rupture coronary (artery) thrombosis infarction of heart, myocardium, or ventricle myocardial infarction specified as acute or with a stated duration of 4 weeks (28 days) or less from onset Use additional code, if applicable, to identify: exposure to environmental tobacco smoke (Z77.22) history of tobacco use (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) Excludes2: old myocardial infarction (I25.2) postmyocardial infarction syndrome (I24.1) subsequent myocardial infarction (I22.-)

Chapter	Diseases of the circulatory system (I00-I99)
ICD-10-CM Children (deeper level / typically more specific) of I21:
I21.0 - ST elevation (STEMI) myocardial infarction of anterior wall
I21.1 - ST elevation (STEMI) myocardial infarction of inferior wall
I21.2 - ST elevation (STEMI) myocardial infarction of other sites
I21.3 - ST elevation (STEMI) myocardial infarction of unspecified site
I21.4 - Non-ST elevation (NSTEMI) myocardial infarction