I21.B

Billable

Myocardial infarction with coronary microvascular dysfunction

I21.B is the ICD-10-CM code for Myocardial infarction with coronary microvascular dysfunction. It is a billable, specific code valid for reimbursement.

Status
Billable
Chapter
I00-I99
Parent
I21
Edition
FY2026

I00-I99 Diseases of the circulatory system

Includes

  • Myocardial infarction with coronary microvascular disease
  • Myocardial infarction with nonobstructive coronary arteries [MINOCA] with microvascular disease

Frequently asked questions

What is ICD-10 code I21.B?
I21.B is the ICD-10-CM code for "Myocardial infarction with coronary microvascular dysfunction". It falls under I00-I99 Diseases of the circulatory system.
Is I21.B a billable code?
Yes — I21.B is a billable, specific ICD-10-CM code valid for reimbursement.

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

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