Convert ICD-10 Code O22.33 to ICD-9

Source ICD-10 Code		Target ICD-9 Code
O22.33 Deep phlebothrombosis in pregnancy, third trimester		671.31 Deep throm antepar-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.
O22.33 Deep phlebothrombosis in pregnancy, third trimester		671.33 Deep vein thromb-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.

ICD-10 to ICD-9 crosswalk for code O22.33 - deep phlebothrombosis in pregnancy, third trimester based on the most recent General Equivalence Mappings (GEMS) information.