I22
⚠ Non-billable
Subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction
ICD-10-CM · FY2026 · Diseases of the Circulatory System
Code
I22
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Diseases of the Circulatory System
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Official coding notes
From CMS's ICD-10-CM Tabular List.
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
Excludes1 — never code together
- subsequent myocardial infarction, type 2 (I21.A1)
- subsequent myocardial infarction of other type (type 3) (type 4) (type 5) (I21.A9)
Use additional code
- 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)
Frequently asked questions
What is ICD-10 code I22?
ICD-10-CM code I22 represents Subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction. It is a non-billable header code requiring a more specific subcategory in the Diseases of the Circulatory System chapter, effective October 1, 2025 – September 30, 2026.
Is I22 billable?
No. I22 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is I22 in?
I22 belongs to the Diseases of the Circulatory System chapter (I00–I99) of ICD-10-CM.
Related codes in the I22 category
I22.0
Subsequent ST elevation (STEMI) myocardial infarction of anterior wall
Billable
I22.1
Subsequent ST elevation (STEMI) myocardial infarction of inferior wall
Billable
I22.2
Subsequent non-ST elevation (NSTEMI) myocardial infarction
Billable
I22.8
Subsequent ST elevation (STEMI) myocardial infarction of other sites
Billable
I22.9
Subsequent ST elevation (STEMI) myocardial infarction of unspecified site
Billable
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