I21.09
BillableST elevation (STEMI) myocardial infarction involving other coronary artery of anterior wall
I21.09 is the ICD-10-CM code for ST elevation (STEMI) myocardial infarction involving other coronary artery of anterior wall. It is a billable, specific code valid for reimbursement.
I00-I99 Diseases of the circulatory system
Includes
- •Acute transmural myocardial infarction of anterior wall
- •Anteroapical transmural (Q wave) infarction (acute)
- •Anterolateral transmural (Q wave) infarction (acute)
- •Anteroseptal transmural (Q wave) infarction (acute)
- •Transmural (Q wave) infarction (acute) (of) anterior (wall) NOS
Frequently asked questions
- What is ICD-10 code I21.09?
- I21.09 is the ICD-10-CM code for "ST elevation (STEMI) myocardial infarction involving other coronary artery of anterior wall". It falls under I00-I99 Diseases of the circulatory system.
- Is I21.09 a billable code?
- Yes — I21.09 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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