Convert ICD-10 Code T66.XXXA to ICD-9

Source ICD-10 Code		Target ICD-9 Code
T66.XXXA Radiation sickness, unspecified, initial encounter		990 Effects radiation 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 T66.XXXA - radiation sickness, unspecified, initial encounter based on the most recent General Equivalence Mappings (GEMS) information.