Oligohydramnios, second trimester, fetus 2

This code signifies a reduced amount of amniotic fluid surrounding the fetus during the second trimester of pregnancy, specifically for the second fetus in a multiple gestation. Oligohydramnios can indicate potential fetal distress, renal anomalies, or placental insufficiency.

Apply this code when documentation confirms oligohydramnios in the second trimester for the second fetus in a twin or higher-order pregnancy. This diagnosis is typically made via ultrasound measurement of the amniotic fluid index (AFI) or deepest vertical pocket (DVP).

• Ensure the documentation clearly specifies "second trimester" and "fetus 2" to support this specific code.
• Distinguish from oligohydramnios occurring in other trimesters (O41.01- for first, O41.03- for third).
• Code any associated maternal conditions or fetal anomalies separately.