Convert ICD-10 Code G43.C1 to ICD-9

Source ICD-10 Code		Target ICD-9 Code
G43.C1 Periodic headache syndromes in child or adult, intractable		346.21 Vrnt mgrn w ntrc mgr NEC
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 G43.C1 - periodic headache syndromes in child or adult, intractable based on the most recent General Equivalence Mappings (GEMS) information.