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

This code signifies an infection of the amniotic fluid and surrounding membranes (chorioamnionitis) in a twin pregnancy, where the specific trimester of the pregnancy is not documented, and the infection is attributed to the second fetus. It indicates an intrauterine infection affecting the gestational sac of one of the twins.

Use this code when the medical record clearly documents chorioamnionitis or amnionitis affecting the second fetus in a multiple gestation, but the specific trimester of pregnancy is not specified. Documentation should confirm the presence of infection within the amniotic sac and its association with the second twin.

• Ensure documentation specifies "fetus 2" to differentiate from other fetuses in a multiple gestation.
• Avoid using this code if the trimester is known; instead, use a more specific O41.11- or O41.12- code.
• Always sequence this code after the primary obstetric complication or condition if applicable.