Acute myocardial infarction
Non-billable header
I21 is a non-billable header code. Use one of the more specific codes below.
Inclusion terms
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 — may be reported together when both conditions exist.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- systemic connective tissue disorders (M30-M36)
- transient cerebral ischemic attacks and related syndromes (G45.-)
- old myocardial infarction (I25.2)
- postmyocardial infarction syndrome (I24.1)
- subsequent type 1 myocardial infarction (I22.-)
Use additional code
Add a code to identify the following, if applicable.
- 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)
Code also
An additional code may be needed.
More specific codes I21
- I21.0ST elevation (STEMI) myocardial infarction of anterior wallHeader
- I21.1ST elevation (STEMI) myocardial infarction of inferior wallHeader
- I21.2ST elevation (STEMI) myocardial infarction of other sitesHeader
- I21.3ST elevation (STEMI) myocardial infarction of unspecified siteBillable
- I21.4Non-ST elevation (NSTEMI) myocardial infarctionBillable
- I21.9Acute myocardial infarction, unspecifiedBillable
- I21.AOther type of myocardial infarctionHeader
- I21.BMyocardial infarction with coronary microvascular dysfunctionBillable
Related codes
- I20Angina pectorisHeader
- I22Subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarctionHeader
- I23Certain current complications following ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction (within the 28 day period)Header
- I24Other acute ischemic heart diseasesHeader
- I25Chronic ischemic heart diseaseHeader