Polyhydramnios, unspecified trimester, fetus 2

This code signifies an excessive accumulation of amniotic fluid surrounding fetus 2 in a multiple gestation pregnancy, where the specific trimester of diagnosis is not documented. Polyhydramnios can lead to various maternal and fetal complications, including preterm labor, placental abruption, and fetal malformations.

This code is appropriate when documentation confirms polyhydramnios affecting fetus 2 in a multiple gestation, but the medical record does not specify the trimester of diagnosis. It is typically used when ultrasound findings indicate an amniotic fluid index (AFI) or deepest vertical pocket (DVP) above the normal range for the gestational age, specifically attributed to the second fetus.

• Ensure the documentation clearly identifies "fetus 2" as the affected fetus in a multiple gestation.
• Avoid using this code if the trimester of diagnosis is specified; instead, use the appropriate trimester-specific code (O40.1XX2, O40.2XX2, O40.3XX2).
• Always sequence this code as a secondary diagnosis following the code for the multiple gestation (e.g., O30.0XX).