Infct of amniotic sac and membrns, unsp, third tri, oth

This code signifies an infection of the amniotic sac and membranes (chorioamnionitis) occurring in the third trimester of pregnancy, specifically affecting a fetus other than the first-born in a multiple gestation. The specific type of infection is not documented or specified.

Use this code when documentation clearly indicates chorioamnionitis in a multifetal pregnancy during the third trimester, and the infection is attributed to a fetus other than the primary one, without further specification of the infectious agent. This code requires documentation of the trimester and the affected fetus's order.

• Ensure documentation specifies "unspecified" infection and "third trimester" for accurate code assignment.
• Distinguish between the first fetus and "other fetus" in multiple gestations; this code is for the latter.
• Always sequence this code after the primary obstetric code indicating the pregnancy.