I22 is a non-billable/non-specific diagnosis code from the 2026 ICD-10-CM used to classify the following condition: Subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction.
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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
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)
Subsequent ST elevation (STEMI) myocardial infarction of anterior wall
Subsequent ST elevation (STEMI) myocardial infarction of inferior wall
Subsequent non-ST elevation (NSTEMI) myocardial infarction
Subsequent ST elevation (STEMI) myocardial infarction of other sites
Subsequent ST elevation (STEMI) myocardial infarction of unspecified site
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