I21.A

I21.A: Other type of myocardial infarction

Non-billable headerICD-10-CM

I21.A is a non-billable header ICD-10-CM code for other type of myocardial infarction. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes2 inherited from the categories above I21.A

Not part of this code, but both may be coded when both are present.

Written on I21: Acute myocardial infarction

old myocardial infarction (I25.2)
postmyocardial infarction syndrome (I24.1)
subsequent type 1 myocardial infarction (I22.-)

Other codes that can never be billed with I21.A

Their own Excludes1 notes name this code, so the conflict is not listed above.

I22Subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction
I24.8Other forms of acute ischemic heart disease
I5ANon-ischemic myocardial injury (non-traumatic)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead I21.A

2 child codes. Green means billable.