Chorioamnionitis, unspecified trimester, other fetus

This code signifies an infection of the fetal membranes (amnion and chorion) and amniotic fluid occurring at an unspecified point during pregnancy, affecting a fetus other than the one specified in other codes. It indicates inflammation of these tissues, which can lead to complications for both mother and fetus.

Use this code when documentation confirms chorioamnionitis in a multifetal pregnancy, and the specific trimester is not recorded, nor is the affected fetus explicitly identified as the "first" or "second" fetus. This code is appropriate when the medical record indicates chorioamnionitis but lacks the specificity to assign a more precise code regarding trimester or fetal order.

• Ensure documentation clearly states "chorioamnionitis" and indicates a multifetal pregnancy without specifying the affected fetus or trimester.
• Avoid using this code if the trimester (e.g., first, second, third) or the specific fetus (e.g., first, second, third) is documented; more specific codes exist.
• Always sequence this code after the primary obstetric complication or condition if applicable.