Convert ICD-10 Code W94.31XD to ICD-9

Source ICD-10 Code		Target ICD-9 Code
W94.31XD Expsr to chng in air pressure in arcrft during descent, subs		E902.1 Air press chnge: aircrft
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 W94.31XD - exposure to sudden change in air pressure in aircraft during descent, subsequent encounter based on the most recent General Equivalence Mappings (GEMS) information.