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

This code describes an unspecified infection of the amniotic sac and membranes (chorioamnionitis or amnionitis) occurring during the first trimester of pregnancy, specifically impacting the fourth fetus in a multiple gestation. This condition can lead to significant maternal and fetal complications, including preterm labor, sepsis, and fetal demise.

Use this code when documentation confirms an infection of the amniotic sac and membranes in a pregnant patient during her first trimester, and the infection is unspecified as to its type or causative organism. This code is specifically for the fourth fetus in a multiple gestation pregnancy. Documentation should clearly indicate the trimester and the specific fetus affected.

• Ensure the documentation explicitly states "first trimester" and identifies the "fourth fetus" in a multiple gestation.
• If the specific type of infection (e.g., bacterial, viral) is known, a more specific code from the O41.1- series should be used.
• Always sequence this code after the primary obstetric code indicating the pregnancy status.