ICD-10-CM Diagnosis Code (2025)
Official Description for I21.A9
Other myocardial infarction type
Coding Notes & Guidelines for I21.A9
, if applicable, postprocedural myocardial infarction following cardiac surgery (I97.190), or postprocedural myocardial infarction during cardiac surgery (I97.790)
- Myocardial infarction associated with revascularization procedure
- Myocardial infarction type 3
- Myocardial infarction type 4a
- Myocardial infarction type 4b
- Myocardial infarction type 4c
- Myocardial infarction type 5
- complication, if known and applicable, such as:
- (acute) stent occlusion (T82.897-)
- (acute) stent stenosis (T82.855-)
- (acute) stent thrombosis (T82.867-)
- cardiac arrest due to underlying cardiac condition (I46.2)
- complication of percutaneous coronary intervention (PCI) (I97.89)
- occlusion of coronary artery bypass graft (T82.218-)
Parent Code (Less Specific):
About ICD-10-CM Code I21.A9 (Other myocardial infarction type)
ICD-10-CM code I21.A9 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.A9 became effective on October 1, 2024.
This page provides detailed information about I21.A9 - Other myocardial infarction type. 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 Other myocardial infarction type.