Maternal care for hydrops fetalis, third trimester, fetus 1

This code signifies specialized maternal medical management and monitoring during the third trimester of pregnancy due to the presence of hydrops fetalis in the first identified fetus. Hydrops fetalis is a severe, life-threatening condition characterized by abnormal fluid accumulation in two or more fetal compartments, such as ascites, pleural effusion, pericardial effusion, or skin edema.

Apply this code when a pregnant patient in her third trimester is receiving active medical care specifically addressing a diagnosis of hydrops fetalis in one fetus. Documentation should clearly indicate the diagnosis of hydrops fetalis, the gestational age (third trimester), and the ongoing maternal care related to this fetal condition.

• Always sequence this code as a secondary diagnosis, following the primary code for the underlying cause of the hydrops fetalis (if known and documented).
• Ensure documentation specifies "fetus 1" if multiple gestations are present, to differentiate from other fetuses.
• Verify the gestational age falls within the third trimester (28 weeks 0 days to 40 weeks 6 days) for accurate code assignment.