Placentitis, second trimester, other fetus

This code signifies inflammation of the placenta occurring during the second trimester of pregnancy in a multiple gestation, specifically for a fetus other than the first. Placentitis can be caused by various infections and may lead to adverse pregnancy outcomes.

Apply this code when documentation clearly indicates placentitis affecting a non-first fetus in a multifetal pregnancy, diagnosed between 14 weeks 0 days and 27 weeks 6 days gestation. Supporting documentation should include clinical findings of placental inflammation and the gestational age at diagnosis.

• Ensure the documentation specifies "second trimester" and identifies which fetus (e.g., fetus B, fetus C) is affected by the placentitis.
• Do not use this code for placentitis in a singleton pregnancy or if the placentitis affects the first fetus in a multiple gestation.
• Code any associated maternal infections or complications separately, following sequencing guidelines.