Convert ICD-10 Code I40.1 to ICD-9

Source ICD-10 Code		Target ICD-9 Code
I40.1 Isolated myocarditis		422.91 Idiopathic myocarditis
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 I40.1 - isolated myocarditis based on the most recent General Equivalence Mappings (GEMS) information.