I21.11

✓ Billable

ST elevation (STEMI) myocardial infarction involving right coronary artery

Diseases of the circulatory system (I00-I99)

Also Known As

Inferoposterior transmural (Q wave) infarction (acute)

✅ No additional coding notes for I21.11

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Code Information

CodeI21.11

BillableYes

ParentI21.1

CategoryDiseases of the circulatory system (I00-I99)

Excludes10 rule(s)

Excludes20 note(s)

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)