Placentitis, first trimester, fetus 4

This code signifies inflammation or infection of the placenta occurring during the first trimester of pregnancy, specifically affecting the fourth fetus in a multiple gestation. Placentitis can be caused by various pathogens and may lead to adverse pregnancy outcomes.

Apply this code when documentation clearly indicates placentitis diagnosed in the first trimester for the fourth fetus in a multifetal pregnancy. Supporting documentation should include imaging findings (e.g., ultrasound) or pathological reports confirming placental inflammation, along with the gestational age and fetal number.

• Ensure the documentation specifies "first trimester" and "fetus 4" to accurately assign this code.
• Do not confuse with other placental conditions like placental abruption or placenta previa.
• Always sequence this code as a secondary diagnosis when an underlying maternal infection is identified.