Infct of amniotic sac and membrns, unsp, third tri, fetus 2

This code signifies an infection of the amniotic sac and membranes (chorioamnionitis) occurring during the third trimester of pregnancy, where the specific pathogen is not identified. It indicates that the infection is affecting the second fetus in a multiple gestation pregnancy.

Use this code when documentation confirms chorioamnionitis in the third trimester of a twin pregnancy, and the infection is specifically noted as impacting the second twin, without specifying the causative organism. Supporting documentation would include physician notes detailing signs and symptoms of infection (e.g., maternal fever, uterine tenderness, foul-smelling amniotic fluid) and diagnostic findings, with an explicit mention of the second fetus.

• Ensure documentation clearly specifies "third trimester" and identifies the infection as affecting the "second fetus."
• If the specific organism causing the infection is known, a more specific code from the O41.1- series should be used.
• Always sequence this code after any code for the underlying obstetric condition or complication if applicable.