Chorioamnionitis, third trimester, not applicable or unsp

This code signifies an inflammatory response of the fetal membranes (amnion and chorion) and amniotic fluid due to bacterial infection occurring during the third trimester of pregnancy. It is a serious obstetric complication that can lead to maternal and fetal morbidity.

Apply this code when documentation confirms chorioamnionitis in a pregnant patient in her third trimester, and the specific type or severity is not further specified. This diagnosis is typically supported by clinical signs such as maternal fever, uterine tenderness, foul-smelling amniotic fluid, and fetal tachycardia.

• Always confirm the trimester of pregnancy documented to ensure accurate code selection.
• If the chorioamnionitis is specified as mild, moderate, or severe, a more specific subcategory code should be used.
• Code any associated maternal or fetal complications, such as sepsis or neonatal pneumonia, in addition to this code.