Convert ICD-10 Code D80.9 to ICD-9

Source ICD-10 Code		Target ICD-9 Code
D80.9 Immunodeficiency with predominantly antibody defects, unsp		279.09 Humoral immunity def 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 D80.9 - immunodeficiency with predominantly antibody defects, unspecified based on the most recent General Equivalence Mappings (GEMS) information.