Oligohydramnios, third trimester, fetus 2

This code signifies a reduced amount of amniotic fluid surrounding fetus 2 during the third trimester of a multiple gestation pregnancy. Oligohydramnios can indicate underlying fetal or maternal complications, such as renal anomalies, placental insufficiency, or premature rupture of membranes.

Assign this code when documentation explicitly states oligohydramnios affecting the second fetus in a multiple pregnancy during the third trimester. This diagnosis is typically made via ultrasound measurement of the amniotic fluid index (AFI) or deepest vertical pocket (DVP).

• Ensure the documentation clearly specifies "fetus 2" to differentiate from other fetuses in a multiple gestation.
• Verify the gestational age falls within the third trimester (28 weeks 0 days to delivery).
• Do not confuse with codes for polyhydramnios or oligohydramnios affecting a single fetus or unspecified fetus.