Polyhydramnios, second trimester, fetus 4

This code signifies an excessive accumulation of amniotic fluid surrounding the fetus during the second trimester of pregnancy, specifically identifying the fourth fetus in a multiple gestation. Polyhydramnios can lead to various maternal and fetal complications, including preterm labor, placental abruption, and fetal malformations.

Apply this code when documentation clearly indicates polyhydramnios diagnosed in the second trimester of a multiple gestation pregnancy, and the condition is attributed to the fourth fetus. Supporting documentation should include ultrasound reports detailing amniotic fluid index (AFI) or deepest vertical pocket (DVP) measurements exceeding normal limits for gestational age, along with identification of the affected fetus.

• Ensure the trimester of diagnosis is explicitly stated as "second trimester" and the affected fetus is clearly identified as the "fourth fetus."
• Do not use this code if the polyhydramnios is mild or transient, or if the trimester is not specified.
• Sequence this code after any codes for the underlying cause of the polyhydramnios, if known (e.g., fetal anomaly, maternal diabetes).