Convert ICD-10 Code X31.XXXA to ICD-9

Source ICD-10 Code		Target ICD-9 Code
X31.XXXA Exposure to excessive natural cold, initial encounter		E901.0 Excessive cold: weather
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 X31.XXXA - exposure to excessive natural cold, initial encounter based on the most recent General Equivalence Mappings (GEMS) information.