Convert ICD-10 Code G31.9 to ICD-9

Source ICD-10 Code		Target ICD-9 Code
G31.9 Degenerative disease of nervous system, unspecified		330.9 Cereb degen in child NOS
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.
G31.9 Degenerative disease of nervous system, unspecified		331.9 Cereb degeneration NOS
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 G31.9 - degenerative disease of nervous system, unspecified based on the most recent General Equivalence Mappings (GEMS) information.