Maternal care for oth rhesus isoimmun, second trimester, oth

This code signifies a pregnancy complicated by maternal care for rhesus (Rh) isoimmunization, specifically when the Rh incompatibility is not specified as hydrops fetalis or other severe forms, and the pregnancy is in the second trimester. It indicates that the mother's immune system has developed antibodies against the Rh-positive red blood cells of the fetus, necessitating medical management.

Apply this code when documentation confirms maternal Rh isoimmunization requiring clinical management during the second trimester of a multifetal pregnancy, and the specific type of isoimmunization is not further detailed (e.g., not hydrops). This would be supported by serological testing showing Rh sensitization and a gestational age between 14 weeks 0 days and 27 weeks 6 days for one of the fetuses.

• Ensure the documentation specifies "other rhesus isoimmunization" and not hydrops fetalis (O36.01-) or other specified types.
• Verify the trimester is explicitly documented as the second trimester.
• Confirm this code is for a multifetal pregnancy, as indicated by "other fetus." For a single fetus, a different subcategory would apply.