Convert ICD-10 Code I33.9 to ICD-9

Source ICD-10 Code		Target ICD-9 Code
I33.9 Acute and subacute endocarditis, unspecified		421.9 Ac/subac endocardit NOS

ICD-10 to ICD-9 crosswalk for code I33.9 - acute and subacute endocarditis, unspecified based on the most recent General Equivalence Mappings (GEMS) information.