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

This code signifies an infection of the amniotic fluid and surrounding membranes (chorioamnionitis) occurring during the first trimester of pregnancy. The specific infectious agent is not identified, and the condition affects the second fetus in a multiple gestation.

Apply this code when documentation confirms chorioamnionitis in the first trimester of a twin pregnancy, specifically impacting the second fetus, and the causative organism is not specified. This typically involves clinical signs of infection, such as maternal fever, uterine tenderness, and/or foul-smelling amniotic fluid, in the absence of a definitive pathogen identification.

• Ensure documentation clearly specifies "first trimester" and "fetus 2" for accurate assignment.
• Do not use if a specific infectious agent (e.g., bacterial, viral) is identified; instead, use a more specific code from the O41.1- series.
• Sequence this code after any codes for the underlying maternal condition or complications, if applicable.