Fetomaternal placental transfusion syndrome, unsp trimester

This code describes a condition where there is an abnormal transfer of blood from the fetus to the mother through the placenta. This can lead to fetal anemia and, in severe cases, hydrops fetalis, while the mother may experience iron overload. It represents a form of fetomaternal hemorrhage.

Use this code when documentation confirms a diagnosis of fetomaternal placental transfusion syndrome, but the specific trimester of gestation is not specified. This diagnosis is typically made through ultrasound findings of fetal anemia or hydrops, and confirmed by Kleihauer-Betke test or flow cytometry on maternal blood.

• Do not use this code if the trimester is documented; instead, select a more specific code from the O43.01 series (e.g., O43.011, O43.012, O43.013).
• Always sequence this code as a secondary diagnosis, with the primary diagnosis reflecting the reason for the encounter (e.g., routine prenatal care, management of fetal anemia).
• Ensure documentation clearly states "fetomaternal placental transfusion syndrome" or similar terminology indicating the transfer of fetal blood to the mother.