Chorioamnionitis, first trimester, fetus 2

This code signifies an inflammation of the fetal membranes (chorion and amnion) and amniotic fluid occurring during the first trimester of pregnancy, specifically affecting the second fetus in a multiple gestation. This intrauterine infection can lead to significant maternal and fetal complications.

Assign this code when documentation clearly indicates a diagnosis of chorioamnionitis in a multiple gestation, with the infection identified in the first trimester and specifically attributed to fetus 2. Supporting documentation would include physician notes detailing the diagnosis, gestational age, and identification of the affected fetus.

• Ensure the documentation specifies "first trimester" and "fetus 2" to accurately assign this highly specific code.
• Distinguish from codes for chorioamnionitis in other trimesters or affecting other fetuses in a multiple gestation.
• Always sequence this code as a secondary diagnosis when a more definitive obstetric complication or outcome is present.