Maternal care for oth rhesus isoimmun, unsp trimester, unsp

This code describes maternal care for a pregnancy affected by rhesus (Rh) isoimmunization, specifically when the type of Rh incompatibility is not specified as D, and the trimester of pregnancy is not documented. Rh isoimmunization occurs when an Rh-negative mother is exposed to Rh-positive fetal blood, leading to the production of antibodies that can cross the placenta and cause hemolytic disease in subsequent Rh-positive fetuses.

Use this code when documentation indicates maternal care for Rh isoimmunization, but the specific Rh antigen involved (e.g., anti-c, anti-E) is not identified, and the trimester is not recorded. This code is appropriate when the provider is managing the pregnancy due to the presence of these antibodies, and further specificity is lacking in the medical record.

• Avoid this code if the specific Rh antigen (e.g., Rh D isoimmunization) is documented; use a more specific code from the O36.0- category.
• Query the provider for the specific type of Rh isoimmunization and the trimester if possible to allow for more precise coding.
• This code is for the maternal condition; codes for fetal complications (e.g., hydrops fetalis) should be coded separately if present.