Fetal anemia and thrombocytopenia, third trimester, fetus 1

This code signifies the diagnosis of anemia and/or thrombocytopenia in the first fetus of a multiple gestation pregnancy, occurring during the third trimester. These conditions indicate a deficiency in red blood cells or platelets, respectively, in the developing fetus.

Use this code when documentation specifies fetal anemia or thrombocytopenia affecting fetus 1 in a multifetal pregnancy during the third trimester (28 weeks gestation to delivery). Supporting documentation includes ultrasound findings, fetal blood sampling results, and physician notes detailing the trimester and specific fetus affected.

• Ensure the documentation clearly identifies "fetus 1" in a multiple gestation.
• Verify the gestational age falls within the third trimester.
• Do not use this code for single gestations or for anemia/thrombocytopenia in the mother.