Infct of amniotic sac and membrns, unsp, third tri, fetus 4

This code signifies an unspecified infection of the amniotic sac and membranes (chorioamnionitis) occurring during the third trimester of pregnancy, specifically affecting the fourth fetus in a multiple gestation. This condition involves inflammation of the fetal membranes due to bacterial infection, which can lead to premature rupture of membranes, preterm labor, and fetal distress.

Apply this code when documentation confirms an infection of the amniotic sac and membranes in a pregnant patient in her third trimester, and the specific type of infection is not documented. This code is appropriate for the fourth fetus in a multifetal pregnancy. Supporting documentation should clearly indicate the presence of chorioamnionitis, the gestational trimester, and the fetal order.

• Ensure the documentation specifies "unspecified" infection if the causative organism is unknown; otherwise, a more specific code for the type of infection should be used.
• Verify the trimester of pregnancy and the fetal order (fourth fetus) are explicitly stated in the medical record to justify this specific code.
• Do not use this code if the infection is clearly identified as bacterial, viral, or fungal; instead, select a more specific code from the O41.1- series.