Convert ICD-10 Code O11.2 to ICD-9

Source ICD-10 Code		Target ICD-9 Code
O11.2 Pre-existing hypertension w pre-eclampsia, second trimester		642.21 Old hyperten NEC-deliver
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.
O11.2 Pre-existing hypertension w pre-eclampsia, second trimester		642.23 Old hyperten NEC-antepar
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.
O11.2 Pre-existing hypertension w pre-eclampsia, second trimester		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.
O11.2 Pre-existing hypertension w pre-eclampsia, second trimester		642.73 Tox w old hyper-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 O11.2 - pre-existing hypertension with pre-eclampsia, second trimester based on the most recent General Equivalence Mappings (GEMS) information.