Antenatal screening for isoimmunization

This code represents routine prenatal screening performed to detect the presence of maternal antibodies that could potentially cross the placenta and cause hemolytic disease in the fetus or newborn. It specifically refers to tests conducted to identify isoimmunization, such as Rh incompatibility or other red blood cell antigen incompatibilities, before any clinical signs or symptoms manifest.

Use this code for the initial or subsequent antenatal laboratory tests performed to screen for the presence of irregular antibodies in a pregnant patient. This is typically part of standard prenatal care for all pregnant individuals to assess their risk for isoimmunization. It applies when the screening is performed without a prior diagnosis of isoimmunization or known fetal complications.

• Do not use this code if the patient is already diagnosed with isoimmunization; instead, code the specific condition.
• This code is for screening purposes only; do not use it for diagnostic workup following a positive screening result.
• Ensure proper sequencing with codes for routine prenatal care (e.g., V22.x) when applicable.