Convert ICD-10 Code F28 to ICD-9

Source ICD-10 Code		Target ICD-9 Code
F28 Oth psych disorder not due to a sub or known physiol cond		298.9 Psychosis 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 F28 - other psychotic disorder not due to a substance or known physiological condition based on the most recent General Equivalence Mappings (GEMS) information.