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I21.2

⚠ Non-billable (Header)

ST elevation (STEMI) myocardial infarction of other sites

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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Also Known As

Type 1 ST elevation myocardial infarction of other sites

⚠️ Excludes2

inherited from I21

Rules from parent category I21: Acute myocardial infarction

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

📋 Code Instructions

from I21
  • • 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)

Child Codes (2)

I21.21ST elevation (STEMI) myocardial infarction involving left circumflex coronary arteryI21.29ST elevation (STEMI) myocardial infarction involving other sites

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Code Information

CodeI21.2
BillableNo — Header code
ParentI21
CategoryDiseases of the circulatory system (I00-I99)
Excludes10 rule(s)
Excludes23 note(s)
Child codes2

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)