Maternal care for anti-D antibodies, first tri, fetus 1

This code signifies a pregnant patient in her first trimester who is receiving medical care due to the presence of anti-D (Rh) antibodies. These antibodies pose a risk to the fetus, specifically fetus 1 in a multiple gestation pregnancy, potentially leading to hemolytic disease of the newborn.

Apply this code when documentation confirms maternal Rh sensitization requiring monitoring or intervention during the first trimester. This typically involves patients with a history of Rh-negative blood type, previous Rh-positive pregnancies, or documented anti-D antibodies identified through screening.

• Ensure documentation specifies "first trimester" and identifies the affected fetus as "fetus 1" for accurate assignment.
• Do not confuse this with codes for other types of maternal antibodies or for care in subsequent trimesters.
• Always sequence this code as a primary diagnosis when it is the reason for the encounter.