I21.9
BillableAcute myocardial infarction, unspecified
I21.9 is the ICD-10-CM code for Acute myocardial infarction, unspecified. It is a billable, specific code valid for reimbursement.
I00-I99 Diseases of the circulatory system
Includes
- •Myocardial infarction (acute) NOS
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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