2026 ICD-10-CM Diagnosis Code I22Subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction
I22 is a non-billable ICD-10-CM category code for subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction, so it cannot be submitted on claims. Use a more specific code from this category instead, such as I22.0, I22.1, I22.2, and I22.8.
Code Identity
Code Classification
Specific Coding for Subsequent STEMI & NSTEMI mocard infrcOverview
Non-specific codes like I22 require more characters. Use one of these billable codes instead:
Use I22.0 for Subsequent ST elevation (STEMI) myocardial infarction of anterior wall
Use I22.1 for Subsequent ST elevation (STEMI) myocardial infarction of inferior wall
Use I22.2 for Subsequent non-ST elevation (NSTEMI) myocardial infarction
Use I22.8 for Subsequent ST elevation (STEMI) myocardial infarction of other sites
Use I22.9 for Subsequent ST elevation (STEMI) myocardial infarction of unspecified site
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
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
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
Type 1 Excludes
- subsequent myocardial infarction, type 2 I21.A1
- subsequent myocardial infarction of other type type 3 type 4 type 5 I21.A9
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
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Code HistoryHistory
Questions About I22Overview
Is I22 a billable code?
No. This is a category header that groups the codes for subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction, and headers cannot be submitted on claims. Claims for subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction need a more specific code from this category, such as I22.0, I22.1, and I22.2.
