Convert ICD-10 Code O13.4 to ICD-9

Source ICD-10 Code		Target ICD-9 Code
O13.4 Gestatnl htn without significant protein, comp childbirth		642.31 Trans hyperten-delivered
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 O13.4 - gestational [pregnancy-induced] hypertension without significant proteinuria, complicating childbirth based on the most recent General Equivalence Mappings (GEMS) information.