Oligohydramnios, third trimester, not applicable or unsp

This code signifies a reduced amount of amniotic fluid surrounding the fetus during the third trimester of pregnancy. Oligohydramnios can be associated with various maternal or fetal complications, including placental insufficiency, fetal renal anomalies, or premature rupture of membranes.

Use this code when documentation explicitly states oligohydramnios occurring in the third trimester, and further specificity regarding the affected fetus (e.g., twin A, twin B) is not applicable or not documented. This diagnosis is typically supported by ultrasound findings showing an amniotic fluid index (AFI) below the 5th percentile for gestational age or a deepest vertical pocket (DVP) less than 2 cm.

• Ensure the documentation clearly specifies "third trimester" for accurate code assignment.
• Do not use this code if the oligohydramnios is due to premature rupture of membranes (PROM); instead, code the PROM.
• Always sequence this code after any underlying maternal or fetal conditions causing the oligohydramnios, if known.