Oligohydramnios, first trimester, not applicable or unsp

This code signifies a lower-than-normal volume of amniotic fluid surrounding the fetus during the first trimester of pregnancy. Oligohydramnios can indicate potential fetal or maternal complications and requires careful monitoring.

Apply this code when documentation explicitly states oligohydramnios diagnosed during the first trimester, without further specification of the type or cause. This code is appropriate when the medical record does not provide details regarding the specific type of oligohydramnios (e.g., early or late).

• Ensure the documentation clearly specifies "first trimester" for accurate code assignment.
• Do not use this code if the oligohydramnios is specified as early or late, or if the trimester is not documented.
• Always sequence this code as a secondary diagnosis following the primary obstetric code for the pregnancy.