I21.29
Billable codeST elevation (STEMI) myocardial infarction involving other sites
The ICD-10 code for st elevation (stemi) myocardial infarction involving other sites is I21.29.
Clinical notes
Also known as
Alternate wording, synonyms, or specific conditions that fall under this code, listed to help confirm you've picked the right one.
- Acute transmural myocardial infarction of other sites
- Apical-lateral transmural (Q wave) infarction (acute)
- Basal-lateral transmural (Q wave) infarction (acute)
- High lateral transmural (Q wave) infarction (acute)
- Lateral (wall) NOS transmural (Q wave) infarction (acute)
- Posterior (true) transmural (Q wave) infarction (acute)
- Posterobasal transmural (Q wave) infarction (acute)
- Posterolateral transmural (Q wave) infarction (acute)
- Posteroseptal transmural (Q wave) infarction (acute)
- Septal transmural (Q wave) infarction (acute) NOS
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •Laterality-specific codes exist for this condition — confirm the affected side is documented.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- I21.21ST elevation (STEMI) myocardial infarction involving left circumflex coronary artery
- I21.29ST elevation (STEMI) myocardial infarction involving other sites
ICD-9-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.
- 41051Approximate match
- 41061Approximate match
- 41081Approximate match
- 41050Approximate match
- 41052Approximate match
- 41060Approximate match
- 41062Approximate match
- 41080Approximate match
- 41082Approximate match
Associated MS-DRGs
I21.29 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.
Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.
- DRG 205Other Respiratory System Diagnoses with MCC
- DRG 206Other Respiratory System Diagnoses without MCC
- DRG 280Acute Myocardial Infarction, Discharged Alive with MCC
- DRG 281Acute Myocardial Infarction, Discharged Alive with CC
- DRG 282Acute Myocardial Infarction, Discharged Alive without CC/MCC
- DRG 283Acute Myocardial Infarction, Expired with MCC
- DRG 284Acute Myocardial Infarction, Expired with CC
- DRG 285Acute Myocardial Infarction, Expired without CC/MCC