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2. ICD-10 Codes
3. Chapter - I00-I99
4. Section - I20-I25
5. Category - I21
6. I21.A

I21.A - Other type of myocardial infarction

• Applicable to Other type of myocardial infarction
• The 2025 edition of ICD10-CM I21.A became effective on October 1, 2024.
• This is the American ICD10-CM version of I21.A - other international versions of ICD10 I21.A may differ.
• I21.A is a Non-Billable / Non-Specific ICD10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
• I21.A Code should not be used for billing or reimbursement purposes as there are multiple ICD-10 CM codes below it that contain a greater level of detail.

The following codes above I21.A contain annotation back-references that may be applicable to I21.A:

• Chapter: I00-I99 - Diseases of the circulatory system
• Section: I20-I25 - Ischemic heart diseases
• Category: I21 - Acute myocardial infarction

Browse other similar CM codes:

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.