ICD-10-CM Diagnosis Code (2025)
Official Description for I21.9
Acute myocardial infarction, unspecified
Coding Notes & Guidelines for I21.9
Inclusion Terms
Myocardial infarction (acute) NOS
Parent Code (Less Specific):
About ICD-10-CM Code I21.9 (Acute myocardial infarction)
ICD-10-CM code I21.9 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM I21.9 became effective on October 1, 2024.
This page provides detailed information about I21.9 - Acute myocardial infarction, unspecified. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Acute myocardial infarction related to unspecified.