Acute myocardial infarction - I21
This notation helps users understand the scope of a code I21 category and provides additional information about the conditions or terms that fall under that category.
Category 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: This note indicates that an additional code should be used in conjunction with the primary code "I21" to provide a complete picture of the patient's condition or to capture associated factors.
Use Additional:
- 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)
Excludes2: This note means that the conditions described by two codes are not usually associated with each other but can sometimes occur together.
Type 2 Excludes:
- old myocardial infarction (I25.2)
- postmyocardial infarction syndrome (I24.1)
- subsequent type 1 myocardial infarction (I22.-)
These ranges represents subcategories of Acute myocardial infarction. The "I21" signifies that these are the diseases within this broad category.
Codes:
- I21.0 - ST elevation (STEMI) myocardial infarction of anterior wall
- I21.01 - ST elevation (STEMI) myocardial infarction involving left main coronary artery
- I21.02 - ST elevation (STEMI) myocardial infarction involving left anterior descending coronary artery
- I21.09 - ST elevation (STEMI) myocardial infarction involving other coronary artery of anterior wall
- I21.1 - ST elevation (STEMI) myocardial infarction of inferior wall
- I21.11 - ST elevation (STEMI) myocardial infarction involving right coronary artery
- I21.19 - ST elevation (STEMI) myocardial infarction involving other coronary artery of inferior wall
- I21.2 - ST elevation (STEMI) myocardial infarction of other sites
- I21.21 - ST elevation (STEMI) myocardial infarction involving left circumflex coronary artery
- I21.29 - ST elevation (STEMI) myocardial infarction involving other sites
- I21.3 - ST elevation (STEMI) myocardial infarction of unspecified site
- I21.4 - Non-ST elevation (NSTEMI) myocardial infarction
- I21.9 - Acute myocardial infarction, unspecified
- I21.A - Other type of myocardial infarction
- I21.A1 - Myocardial infarction type 2
- I21.A9 - Other myocardial infarction type
- I21.B - Myocardial infarction with coronary microvascular dysfunction