Oligohydramnios, third trimester, fetus 3

This code signifies a reduced amount of amniotic fluid surrounding the fetus during the third trimester of pregnancy, specifically when there are three fetuses present. Oligohydramnios can indicate potential fetal compromise or underlying maternal conditions requiring close monitoring.

Apply this code when documentation clearly indicates oligohydramnios diagnosed in the third trimester of a triplet pregnancy. This diagnosis is typically made via ultrasound measurement of the amniotic fluid index (AFI) or deepest vertical pocket (DVP).

• Ensure the documentation specifies "third trimester" and "fetus 3" to accurately assign this code.
• Distinguish from oligohydramnios in other trimesters or with a different number of fetuses (e.g., O41.01X0 for single fetus, first trimester).
• Always sequence this code after the primary obstetric code indicating the pregnancy itself (e.g., O30.2- for triplet pregnancy).