Convert ICD-10 Code O11.4 to ICD-9

Source ICD-10 Code		Target ICD-9 Code
O11.4 Pre-existing htn with pre-eclampsia, comp childbirth		642.71 Tox w old hyperten-deliv
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.
O11.4 Pre-existing htn with pre-eclampsia, comp childbirth		642.72 Tox w old hyp-del w p/p
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 O11.4 - pre-existing hypertension with pre-eclampsia, complicating childbirth based on the most recent General Equivalence Mappings (GEMS) information.