Chorioamnionitis, third trimester, fetus 5

This code signifies an infection of the fetal membranes (amnion and chorion) and amniotic fluid occurring during the third trimester of pregnancy, specifically affecting the fifth fetus in a multiple gestation. Chorioamnionitis can lead to serious maternal and fetal complications, including preterm labor, sepsis, and neonatal infection.

Apply this code when documentation clearly indicates a diagnosis of chorioamnionitis in a pregnant patient who is in her third trimester. This code is specifically for the fifth fetus in a multifetal pregnancy, requiring clear identification of the affected fetus. Supporting documentation should include clinical signs of infection (e.g., fever, uterine tenderness, purulent amniotic fluid) and laboratory findings.

• Ensure the documentation explicitly states "third trimester" and identifies the affected fetus as the "fifth fetus" in a multiple gestation.
• Do not confuse with codes for chorioamnionitis in other trimesters or for different fetal positions in multiple gestations.
• Sequence this code as a secondary diagnosis when the primary reason for the encounter is related to the management of the chorioamnionitis or its complications.