Convert ICD-10 Code O21.1 to ICD-9

Source ICD-10 Code		Target ICD-9 Code
O21.1 Hyperemesis gravidarum with metabolic disturbance		643.13 Hyperem w metab-antepart
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 O21.1 - hyperemesis gravidarum with metabolic disturbance based on the most recent General Equivalence Mappings (GEMS) information.