Maternal care for oth rhesus isoimmun, unsp tri, fetus 1

This code signifies maternal care provided due to rhesus (Rh) isoimmunization, a condition where the mother's immune system produces antibodies against the Rh-positive red blood cells of her fetus. This specific code is used when the type of Rh isoimmunization is not further specified, and the trimester of pregnancy is also not documented. It applies to the first fetus in a multiple gestation.

Use this code when documentation indicates maternal management for Rh incompatibility without specifying the exact type of Rh isoimmunization (e.g., anti-D, anti-C, anti-E) or the trimester of pregnancy. This code is appropriate for single gestations or when referring to the first fetus in a multiple gestation. Documentation should clearly state "rhesus isoimmunization" or "Rh incompatibility" as the reason for maternal care.

• Ensure documentation specifies "other rhesus isoimmunization" when a more precise type is not known or documented.
• Verify that the trimester of pregnancy is not specified in the medical record; otherwise, a more specific trimester code should be used.
• This code is for the first fetus; for subsequent fetuses in a multiple gestation, use the appropriate codes for fetus 2, fetus 3, etc.