Convert ICD-10 Code I21.21 to ICD-9

Source ICD-10 Code		Target ICD-9 Code
I21.21 STEMI involving left circumflex coronary artery		410.81 AMI NEC, 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.

ICD-10 to ICD-9 crosswalk for code I21.21 - st elevation (stemi) myocardial infarction involving left circumflex coronary artery based on the most recent General Equivalence Mappings (GEMS) information.