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

Source ICD-10 Code		Target ICD-9 Code
I40.9 Acute myocarditis, unspecified		422.90 Acute myocarditis NOS

ICD-10 to ICD-9 crosswalk for code I40.9 - acute myocarditis, unspecified based on the most recent General Equivalence Mappings (GEMS) information.