Oligohydramnios, unspecified trimester, fetus 1

This code signifies a lower than normal amount of amniotic fluid surrounding the fetus, without specifying the gestational age at which it was diagnosed. Oligohydramnios can lead to various fetal complications, including growth restriction, pulmonary hypoplasia, and umbilical cord compression.

Use this code when documentation indicates oligohydramnios but does not specify the trimester of diagnosis. This typically occurs when the medical record simply states "oligohydramnios" without further detail regarding the gestational week or trimester. Supporting documentation would include ultrasound reports noting reduced amniotic fluid index (AFI) or deepest vertical pocket (DVP).

• Avoid using this code if the trimester is clearly documented; instead, select the appropriate trimester-specific code (O41.01X, O41.02X, O41.03X).
• Always sequence this code as a secondary diagnosis when a more specific obstetric complication is identified as the primary reason for the encounter.
• Ensure the medical record supports the diagnosis of oligohydramnios, typically through sonographic findings.