Convert ICD-10 Code D89.40 to ICD-9

Source ICD-10 Code Target ICD-9 Code
D89.40
Mast cell activation, unspecified
279.8
Immune mechanism dis 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 D89.40 - mast cell activation, unspecified based on the most recent General Equivalence Mappings (GEMS) information.