Convert ICD-10 Code I21.9 to ICD-9

Source ICD-10 Code Target ICD-9 Code
I21.9
Acute myocardial infarction, unspecified
410.90
AMI NOS, unspecified
Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.
I21.9
Acute myocardial infarction, unspecified
410.91
AMI NOS, initial
Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.
I21.9
Acute myocardial infarction, unspecified
410.92
AMI NOS, subsequent
Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.

ICD-10 to ICD-9 crosswalk for code I21.9 - acute myocardial infarction, unspecified based on the most recent General Equivalence Mappings (GEMS) information.