I22.8

ICD-10Billable

Subsequent STEMI of sites

Official ICD-10-CM descriptor (FY2026)

Subsequent ST elevation (STEMI) myocardial infarction of other sites

I22.8 is valid for submission on a claim — CMS flags it as a billable, specific code.

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)

Related codes in I22

Where this code sits

Chapter: 9. Diseases of the circulatory system (I00-I99)
Block: Ischemic heart diseases (I20-I25)
Parent code: I22

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.