I22.8 is the authoritative medical code for Subsequent ST elevation STEMI myocardial infarction of other sites. This classification is used in medical billing and clinical recording to specify the clinical criteria for subsequent st elevation stemi myocardial infarction of other sites (ICD-10-CM I22.8), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Subsequent ST elevation STEMI myocardial infarction of other sites is a billable ICD-10-CM diagnosis code I22.8. 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. 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. Excludes1 (not coded here): 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. Code also: the presence of hypertension I10-I1A.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for I22.8 in the official ICD-10-CM tabular list.
Includes
Conditions the official ICD-10-CM tabular list includes under this code.
- 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
Inclusion Terms
Alternative terms the tabular list files under this code.
- 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
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- subsequent myocardial infarction, type 2 I21.A1
- subsequent myocardial infarction of other type (type 3) (type 4) (type 5) I21.A9
Code Also
Additional codes that may be required to fully describe the encounter.
- the presence of hypertension I10-I1A
Use Additional Code
Supplementary codes the tabular list directs you to add.
- 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 (FAQ) & Clinical Guidance
What can't be coded together with I22.8?
Per Excludes1 instructions, I22.8 must not be reported with: subsequent myocardial infarction, type 2 (I21.A1); subsequent myocardial infarction of other type (type 3) (type 4) (type 5) (I21.A9).
Is an additional code needed with I22.8?
Use additional code(s) to specify: 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).
What conditions are included under I22.8?
Subsequent ST elevation STEMI myocardial infarction of other sites includes: 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.
Codes in This Family (5)
Official ICD-10-CM classifications in the same code family as I22.8, with their registry titles.
- I22 — Subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction
- I22.0 — Subsequent ST elevation (STEMI) myocardial infarction of anterior wall
- I22.1 — Subsequent ST elevation (STEMI) myocardial infarction of inferior wall
- I22.2 — Subsequent non-ST elevation (NSTEMI) myocardial infarction
- I22.9 — Subsequent ST elevation (STEMI) myocardial infarction of unspecified site
Indexed Clinical Terms (12)
Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.
- 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), posterior (posterobasal) (posterolateral) (posteroseptal) (true), 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
- 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), subsequent (recurrent) (reinfarction), posterior (posterobasal) (posterolateral) (posteroseptal) (true)
- 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), ST elevation, specified NEC
- Infarct, infarction, myocardium, myocardial (acute) (with stated duration of 4 weeks or less), subsequent (recurrent) (reinfarction), transmural, lateral (apical-lateral) (basal-lateral) (high)
- Infarct, infarction, myocardium, myocardial (acute) (with stated duration of 4 weeks or less), subsequent (recurrent) (reinfarction), transmural, posterior (posterobasal) (posterolateral) (posteroseptal) (true)
- Infarct, infarction, myocardium, myocardial (acute) (with stated duration of 4 weeks or less), subsequent (recurrent) (reinfarction), transmural, specified NEC
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures:
ICD Code I23.8
Other current complications following acute myocardial infarction