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I21 Acute myocardial infarction

Non-Billable/Non-Specific

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 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)

Type 2 Excludes

  • old myocardial infarction (I25.2)
  • postmyocardial infarction syndrome (I24.1)
  • subsequent type 1 myocardial infarction (I22.-)

Codes

  • I21.0ST elevation (STEMI) myocardial infarction of anterior wall
    • I21.01ST elevation (STEMI) myocardial infarction involving left main coronary artery
    • I21.02ST elevation (STEMI) myocardial infarction involving left anterior descending coronary artery
    • I21.09ST elevation (STEMI) myocardial infarction involving other coronary artery of anterior wall
  • I21.1ST elevation (STEMI) myocardial infarction of inferior wall
    • I21.11ST elevation (STEMI) myocardial infarction involving right coronary artery
    • I21.19ST elevation (STEMI) myocardial infarction involving other coronary artery of inferior wall
  • I21.2ST elevation (STEMI) myocardial infarction of other sites
    • I21.21ST elevation (STEMI) myocardial infarction involving left circumflex coronary artery
    • I21.29ST elevation (STEMI) myocardial infarction involving other sites
  • I21.3ST elevation (STEMI) myocardial infarction of unspecified site
  • I21.4Non-ST elevation (NSTEMI) myocardial infarction
  • I21.9Acute myocardial infarction, unspecified
  • I21.AOther type of myocardial infarction
    • I21.A1Myocardial infarction type 2
    • I21.A9Other myocardial infarction type
  • I21.BMyocardial infarction with coronary microvascular dysfunction