Oligohydramnios, third trimester, other fetus

This code signifies a reduced amount of amniotic fluid surrounding a fetus during the third trimester of pregnancy, specifically when there are multiple gestations and this finding pertains to a fetus other than the one designated as the primary or first fetus. It indicates a potential risk for fetal compromise due to inadequate fluid volume.

Apply this code when documentation explicitly states oligohydramnios affecting a non-specified fetus in a multiple gestation pregnancy during the third trimester. This diagnosis is typically confirmed via ultrasound measurements of the amniotic fluid index (AFI) or deepest vertical pocket (DVP).

• Ensure the documentation specifies "other fetus" in a multiple gestation to differentiate from oligohydramnios affecting a specific fetus or a singleton pregnancy.
• Verify the gestational age falls within the third trimester (28 weeks 0 days to 40 weeks 6 days).
• This code requires an additional code to identify the specific type of multiple gestation (e.g., twin, triplet).