Convert ICD-10 Code O16.9 to ICD-9

Source ICD-10 Code		Target ICD-9 Code
O16.9 Unspecified maternal hypertension, unspecified trimester		642.90 Hyperten preg NOS-unspec
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 O16.9 - unspecified maternal hypertension, unspecified trimester based on the most recent General Equivalence Mappings (GEMS) information.