Oligohydramnios, first trimester, other fetus

This code signifies a reduced amount of amniotic fluid surrounding a fetus during the first trimester of pregnancy, specifically when there are multiple fetuses and this condition applies to a fetus other than the one designated as "first." Oligohydramnios can indicate potential fetal renal anomalies, placental insufficiency, or membrane rupture.

Use this code when documentation clearly indicates oligohydramnios affecting a specific fetus (not the primary one) within a multiple gestation pregnancy during the first trimester. Supporting documentation should include ultrasound findings confirming reduced amniotic fluid volume and gestational age.

• Ensure the documentation specifies "other fetus" in a multiple gestation to differentiate from conditions affecting the primary fetus or singletons.
• Verify the gestational age falls within the first trimester (up to 13 weeks and 6 days) for accurate trimester assignment.
• Code any associated maternal or fetal conditions, such as premature rupture of membranes or fetal anomalies, in addition to this code.