Polyhydramnios, third trimester, fetus 1

This code signifies an excessive accumulation of amniotic fluid surrounding the fetus during the third trimester of pregnancy, specifically for the first fetus in a multiple gestation or the only fetus in a singleton pregnancy. This condition can lead to various maternal and fetal complications.

Apply this code when documentation clearly indicates a diagnosis of polyhydramnios occurring in the third trimester. Supporting documentation should include ultrasound findings confirming an amniotic fluid index (AFI) or deepest vertical pocket (DVP) above established thresholds for the gestational age, along with the gestational week.

• Ensure the documentation specifies "third trimester" for accurate code assignment; codes exist for other trimesters.
• Verify the fetus number (e.g., fetus 1, fetus 2) in multiple gestations to select the correct final character.
• Code any associated maternal or fetal conditions contributing to or resulting from the polyhydramnios, such as gestational diabetes or fetal anomalies.