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I21.A9 Other myocardial infarction type

CategoryCODABLE
I21.A9
Other myocardial infarction type
EXAMPLES
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
CODING RULE
Code first: , if applicable, postprocedural myocardial infarction following cardiac surgery (I97.190), or postprocedural myocardial infarction during cardiac surgery (I97.790)
Code also: 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-)
Chapter
IX · Diseases of the circulatory system
Section
I20-I25
Valid from
Source

CMS ICD-10-CM Tabular List, edition FY2026.