Maternal care for anti-D antibodies, unsp trimester, fetus 4

This code signifies ongoing medical supervision and management provided to a pregnant patient due to the presence of anti-D (Rh) antibodies in her system. These antibodies pose a risk of hemolytic disease of the fetus and newborn (HDFN) if the fetus is Rh-positive. The "unspecified trimester" indicates that the specific trimester of pregnancy is not documented, and "fetus 4" specifies that this care pertains to the fourth fetus in a multiple gestation pregnancy.

Use this code when a pregnant patient with Rh-negative blood type has developed anti-D antibodies, and the medical record indicates ongoing monitoring or intervention related to this condition, but the trimester is not specified. This code is appropriate for the fourth fetus in a multifetal pregnancy. Documentation should clearly state the presence of anti-D antibodies and the intent of maternal care related to this condition.

• Ensure documentation specifies "anti-D" or "Rh antibodies" and not other types of maternal antibodies.
• Verify that the documentation explicitly identifies this care as pertaining to the fourth fetus in a multiple gestation.
• If the trimester is known, use a more specific O36.01- code that includes the trimester (e.g., O36.0114 for first trimester).