I21.19
BillableST elevation (STEMI) myocardial infarction involving other coronary artery of inferior wall
I21.19 is the ICD-10-CM code for ST elevation (STEMI) myocardial infarction involving other coronary artery of inferior wall. It is a billable, specific code valid for reimbursement.
I00-I99 Diseases of the circulatory system
Includes
- •Acute transmural myocardial infarction of inferior wall
- •Inferolateral transmural (Q wave) infarction (acute)
- •Transmural (Q wave) infarction (acute) (of) diaphragmatic wall
- •Transmural (Q wave) infarction (acute) (of) inferior (wall) NOS
Excludes2 — not included here
- •ST elevation (STEMI) myocardial infarction involving left circumflex coronary artery (I21.21)
Frequently asked questions
- What is ICD-10 code I21.19?
- I21.19 is the ICD-10-CM code for "ST elevation (STEMI) myocardial infarction involving other coronary artery of inferior wall". It falls under I00-I99 Diseases of the circulatory system.
- Is I21.19 a billable code?
- Yes — I21.19 is a billable, specific ICD-10-CM code valid for reimbursement.
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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