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
What this means — in plain language
MedlinePlus · NIHEach year almost 800,000 Americans have a heart attack. A heart attack happens when blood flow to the heart suddenly becomes blocked. Without the blood coming in, the heart can't get oxygen. If not treated quickly, the heart muscle begins to die. But if you do get quick treatment, you may be able to prevent or limit damage to the heart muscle. That's why it's important to know the symptoms of a heart attack and call…
Read more about Heart Attack at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
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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