Maternal care for Anti-A sensitization, third tri, fetus 2

This code signifies specialized maternal care provided during the third trimester of pregnancy due to the mother developing antibodies against the A antigen in the fetal red blood cells, specifically affecting the second fetus in a multiple gestation. This sensitization can lead to hemolytic disease of the fetus and newborn (HDFN) if the fetus is A-positive.

Apply this code when a pregnant patient in her third trimester is receiving monitoring or treatment for Anti-A alloimmunization, and the affected fetus is identified as the second fetus in a multifetal pregnancy. Documentation should clearly indicate the trimester, the specific antibody (Anti-A), and the fetal order.

• Ensure documentation specifies "third trimester" and "fetus 2" for accurate assignment.
• Do not confuse with other blood group sensitizations (e.g., Anti-Rh, Anti-B); this code is specific to Anti-A.
• Sequence this code as a primary diagnosis when the maternal care is primarily for the sensitization, or as a secondary diagnosis when another condition is the primary reason for the encounter.