Oligohydramnios, second trimester, fetus 1

This code signifies a reduced volume of amniotic fluid surrounding the fetus during the second trimester of pregnancy. Oligohydramnios can indicate potential fetal compromise, renal anomalies, or placental insufficiency.

Apply this code when documentation confirms oligohydramnios detected between 14 weeks 0 days and 27 weeks 6 days of gestation for the first fetus in a multiple gestation or the only fetus in a singleton pregnancy. This diagnosis is typically made via ultrasound measurement of the amniotic fluid index (AFI) or deepest vertical pocket (DVP).

• Ensure the documentation explicitly states "second trimester" and identifies the affected fetus (e.g., "fetus A" or "fetus 1").
• Do not use this code if the oligohydramnios is due to premature rupture of membranes (PROM); a more specific code for PROM should be used.
• Sequence this code as a secondary diagnosis when the underlying cause of the oligohydramnios is known and documented.