Polyhydramnios, first trimester, other fetus

This code signifies an excessive accumulation of amniotic fluid surrounding a fetus during the first trimester of a multifetal pregnancy, specifically when the condition affects a fetus other than the one designated as the primary or first fetus. Polyhydramnios can indicate underlying fetal anomalies, maternal conditions like diabetes, or placental issues.

Assign this code when documentation clearly identifies polyhydramnios in the first trimester of a multiple gestation, and specifies that the affected fetus is not the "first" or "primary" fetus. Supporting documentation would include ultrasound reports detailing amniotic fluid index (AFI) or deepest vertical pocket (DVP) measurements exceeding normal limits for gestational age, along with a clear indication of which fetus is affected.

• Ensure the documentation specifies "first trimester" and "other fetus" in a multifetal pregnancy.
• Do not use this code for singleton pregnancies or if the polyhydramnios is noted in a later trimester.
• Consider sequencing this code after any codes for underlying maternal conditions (e.g., diabetes) or fetal anomalies contributing to the polyhydramnios.