I21
Acute myocardial infarction
Non-billableCategory
Chapter: 9. Diseases of the circulatory system
Section: I20-I25 - Ischemic heart diseases
Coding Guidelines
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
Excludes2 (Not Included Here)
These conditions are not part of this code but may be reported additionally if documented
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)
Specific Codes (8)
I21.0Category
ST elevation (STEMI) myocardial infarction of anterior wall
I21.1Category
ST elevation (STEMI) myocardial infarction of inferior wall
I21.2Category
ST elevation (STEMI) myocardial infarction of other sites
I21.3Billable
ST elevation (STEMI) myocardial infarction of unspecified site
I21.4Billable
Non-ST elevation (NSTEMI) myocardial infarction
I21.9Billable
Acute myocardial infarction, unspecified
I21.ACategory
Other type of myocardial infarction
I21.BBillable
Myocardial infarction with coronary microvascular dysfunction
