Chorioamnionitis, first trimester, fetus 4

This code signifies an inflammatory or infectious condition of the fetal membranes (chorion and amnion) and amniotic fluid occurring during the first trimester of pregnancy, specifically affecting the fourth fetus in a multiple gestation. It indicates an intrauterine infection that can lead to significant maternal and fetal complications.

Use this code when documentation confirms chorioamnionitis diagnosed in the first trimester for the fourth fetus in a multifetal pregnancy. Supporting documentation should include clinical signs of infection (e.g., maternal fever, uterine tenderness, foul-smelling amniotic fluid), laboratory findings (e.g., elevated white blood cell count, positive amniotic fluid culture), and ultrasound findings.

• Ensure the documentation clearly specifies "first trimester" and identifies the affected fetus as "fetus 4" in a multiple gestation.
• Do not confuse this with other gestational trimesters or chorioamnionitis affecting a different fetus in a multiple pregnancy.
• Code any associated maternal conditions or complications, such as sepsis or preterm labor, in addition to the chorioamnionitis.