I22.8 Subsequent ST elevation (STEMI) myocardial infarction of other sites
The ICD-10-CM code for Subsequent ST elevation (STEMI) myocardial infarction of other sites is I22.8 (FY2026). It is a billable, claim-ready diagnosis code.
Classification
- Section
- I20-I25: Ischemic heart diseases (I20-I25)
- Category I22
- 6 codes (5 billable)
- FY2026 Status
- Stable since FY2024
Also Known As
ICD-10-CM Alphabetic Index entries that lead to I22.8:
- Infarct, infarction › myocardium, myocardial (acute) (with stated duration of 4 weeks or less) › subsequent (recurrent) (reinfarction) › septal
- Infarct, infarction › myocardium, myocardial (acute) (with stated duration of 4 weeks or less) › subsequent (recurrent) (reinfarction) › specified NEC
- Infarct, infarction › myocardium, myocardial (acute) (with stated duration of 4 weeks or less) › subsequent (recurrent) (reinfarction) › posterior (posterobasal) (posterolateral) (posteroseptal) (true)
- Infarct, infarction › myocardium, myocardial (acute) (with stated duration of 4 weeks or less) › subsequent (recurrent) (reinfarction) › lateral (apical-lateral) (basal-lateral) (high)
- Infarct, infarction › myocardium, myocardial (acute) (with stated duration of 4 weeks or less) › ST elevation (STEMI) › posterior (posterobasal) (posterolateral) (posteroseptal) (true) › subsequent
- Infarct, infarction › myocardium, myocardial (acute) (with stated duration of 4 weeks or less) › ST elevation (STEMI) › lateral (apical-lateral) (basal-lateral) (high) › subsequent
- Infarct, infarction › myocardium, myocardial (acute) (with stated duration of 4 weeks or less) › ST elevation (STEMI) › septal › subsequent
- Infarct, infarction › myocardium, myocardial (acute) (with stated duration of 4 weeks or less) › ST elevation (STEMI) › specified NEC › subsequent
Inclusion Terms
- Subsequent acute transmural myocardial infarction of other sites
- Subsequent apical-lateral transmural (Q wave) myocardial infarction (acute)
- Subsequent basal-lateral transmural (Q wave) myocardial infarction (acute)
- Subsequent high lateral transmural (Q wave) myocardial infarction (acute)
- Subsequent transmural (Q wave) myocardial infarction (acute)(of) lateral (wall) NOS
- Subsequent posterior (true) transmural (Q wave) myocardial infarction (acute)
- Subsequent posterobasal transmural (Q wave) myocardial infarction (acute)
- Subsequent posterolateral transmural (Q wave) myocardial infarction (acute)
- Subsequent posteroseptal transmural (Q wave) myocardial infarction (acute)
- Subsequent septal NOS transmural (Q wave) myocardial infarction (acute)
U.S. Hospital Utilization
- An estimated 205 U.S. inpatient stays in 2023 included I22.8 among the documented diagnoses.
- 75 stays listed it as the principal diagnosis.
Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.
Official Coding Guidelines
Presumed relationship due to Index term “with”The classification presumes a causal relationship between hypertension and heart involvement and between hypertension and kidney involvement, as the two conditions are linked by the term “with” in the Alphabetic Index. These conditions should be coded as related even in the absence of provider documentation explicitly linking them, unless the documentation clearly states the conditions are unrelated.
Provider must link conditions not specifically indexed as relatedFor hypertension and conditions not specifically linked by relational terms such as “with,” “associated with” or “due to” in the classification, provider documentation must link the conditions in order to code them as related.
Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026