Oligohydramnios, second trimester, fetus 4

This code signifies a reduced amount of amniotic fluid surrounding the fetus during the second trimester of pregnancy, specifically affecting the fourth fetus in a multiple gestation. Oligohydramnios can indicate potential fetal compromise or underlying maternal/fetal conditions.

Apply this code when documentation clearly indicates oligohydramnios diagnosed between 14 weeks 0 days and 27 weeks 6 days of gestation in the fourth fetus of a multifetal pregnancy. Supporting documentation includes ultrasound reports detailing amniotic fluid index (AFI) or deepest vertical pocket (DVP) measurements below established norms for gestational age, along with identification of the affected fetus.

• Ensure the documentation explicitly identifies the affected fetus as the fourth in a multiple gestation.
• Verify the gestational age falls within the second trimester (14-27 weeks) for accurate trimester assignment.
• Do not confuse with codes for oligohydramnios in other trimesters or affecting different fetuses in a multiple gestation.