Convert ICD-10 Code A37.90 to ICD-9

Source ICD-10 Code		Target ICD-9 Code
A37.90 Whooping cough, unspecified species without pneumonia		033.9 Whooping cough 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 A37.90 - whooping cough, unspecified species without pneumonia based on the most recent General Equivalence Mappings (GEMS) information.