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I21.A

Non-billable

Other type of myocardial infarction

I21.A is the ICD-10-CM code for Other type of myocardial infarction. It is a non-billable category code — use a more specific child code such as I21.A1 for billing.

Status
Header (non-billable)
Chapter
I00-I99
Parent
I21
Subcodes
2
Edition
FY2026

I00-I99 Diseases of the circulatory system

No additional coding notes for this code.

Frequently asked questions

What is ICD-10 code I21.A?
I21.A is the ICD-10-CM code for "Other type of myocardial infarction". It falls under I00-I99 Diseases of the circulatory system.
Is I21.A a billable code?
No — I21.A is a non-billable header code. Use a more specific child code (such as I21.A1) for billing.
What are the subcodes of I21.A?
I21.A has 2 more specific child codes, including I21.A1, I21.A9.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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