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I22

⚠ Non-billable (Header)

Subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction

Diseases of the circulatory system (I00-I99)

⚠️ This is a category header code — not billable. Use a more specific child code below.

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✅ Includes

  • • 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 Instructions

  • • 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)

❌ Excludes1

direct

Cannot be coded with I22

  • • subsequent myocardial infarction, type 2 (I21.A1)
  • • subsequent myocardial infarction of other type (type 3) (type 4) (type 5) (I21.A9)

Child Codes (5)

I22.0Subsequent ST elevation (STEMI) myocardial infarction of anterior wallI22.1Subsequent ST elevation (STEMI) myocardial infarction of inferior wallI22.2Subsequent non-ST elevation (NSTEMI) myocardial infarctionI22.8Subsequent ST elevation (STEMI) myocardial infarction of other sitesI22.9Subsequent ST elevation (STEMI) myocardial infarction of unspecified site

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Code Information

CodeI22
BillableNo — Header code
CategoryDiseases of the circulatory system (I00-I99)
Excludes12 rule(s)
Excludes20 note(s)
Child codes5

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)