Maternal care for anti-D antibodies, third tri, fetus 2

This code signifies ongoing maternal care during the third trimester for a pregnancy complicated by the presence of anti-D (Rh) antibodies, specifically when affecting the second fetus in a multiple gestation. These antibodies can cross the placenta and cause hemolytic disease of the fetus and newborn (HDFN) if the fetus is Rh-positive.

Use this code when a pregnant patient, in her third trimester, is receiving management for Rh isoimmunization, and the documentation clearly identifies the second fetus as the one being monitored or treated for potential complications. Documentation should confirm the presence of anti-D antibodies and the gestational age.

• Ensure documentation specifies "fetus 2" in a multiple gestation to differentiate from other fetuses.
• Always sequence this code as a secondary diagnosis following the primary obstetric code for the encounter.
• Verify the trimester documented in the medical record aligns with "third trimester" for accurate code assignment.