Polyhydramnios, third trimester, fetus 2

This diagnosis code indicates an excessive accumulation of amniotic fluid surrounding the second fetus in a multiple gestation pregnancy during the third trimester. Polyhydramnios can lead to various maternal and fetal complications, including preterm labor, placental abruption, and fetal malposition.

Assign this code when documentation explicitly states polyhydramnios affecting the second fetus in a multifetal pregnancy, and the gestational age is within the third trimester (28 weeks 0 days gestation until delivery). This diagnosis is typically supported by ultrasound findings demonstrating an amniotic fluid index (AFI) above the 95th percentile or a deepest vertical pocket (DVP) greater than 8 cm for the second fetus.

• Ensure the documentation clearly specifies "fetus 2" in a multiple gestation.
• Verify the gestational age falls within the third trimester for accurate code assignment.
• Do not confuse with codes for polyhydramnios in single gestations or affecting other fetuses in a multiple gestation.