I21.A9
BillableOther myocardial infarction type
I21.A9 is the ICD-10-CM code for Other myocardial infarction type. It is a billable, specific code valid for reimbursement.
I00-I99 Diseases of the circulatory system
Includes
- •Myocardial infarction associated with revascularization procedure
- •Myocardial infarction type 3
- •Myocardial infarction type 4a
- •Myocardial infarction type 4b
- •Myocardial infarction type 4c
- •Myocardial infarction type 5
Code first
Notes
- •complication, if known and applicable, such as:
- •(acute) stent occlusion (T82.897-)
- •(acute) stent stenosis (T82.855-)
- •(acute) stent thrombosis (T82.867-)
- •cardiac arrest due to underlying cardiac condition (I46.2)
- •complication of percutaneous coronary intervention (PCI) (I97.89)
- •occlusion of coronary artery bypass graft (T82.218-)
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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