Polyhydramnios, second trimester, fetus 1

This code signifies an excessive accumulation of amniotic fluid surrounding the fetus during the second trimester of pregnancy. Polyhydramnios can be associated with various maternal or fetal complications, including gestational diabetes, fetal anomalies, or multiple gestations.

Apply this code when documentation clearly indicates a diagnosis of polyhydramnios specifically identified in the second trimester for the first fetus in a multiple gestation. This diagnosis is typically made via ultrasound measurement of the amniotic fluid index (AFI) or deepest vertical pocket (DVP).

• Ensure the trimester is explicitly documented as "second trimester" to differentiate from polyhydramnios in other trimesters.
• Verify that the documentation specifies "fetus 1" if applicable; otherwise, use the unspecified fetus code.
• Always code any associated maternal or fetal conditions contributing to or resulting from the polyhydramnios.