Oligohydramnios, first trimester, fetus 2

This code signifies an abnormally low volume of amniotic fluid surrounding the second fetus in a multiple gestation pregnancy during the first trimester. Oligohydramnios can indicate underlying fetal or maternal issues, such as renal anomalies or placental insufficiency, and requires close monitoring.

Assign this code when documentation confirms oligohydramnios affecting the second fetus in a multifetal pregnancy, specifically identified in the first trimester (up to 13 weeks and 6 days gestation). Supporting documentation should include ultrasound reports detailing amniotic fluid index (AFI) or deepest vertical pocket (DVP) measurements below established norms for gestational age.

• Ensure the documentation clearly specifies "fetus 2" in a multiple gestation.
• Verify the gestational age falls within the first trimester; otherwise, a different trimester-specific code for oligohydramnios would be appropriate.
• Code any underlying maternal or fetal conditions contributing to the oligohydramnios, if known and documented.