Maternal care for unsp congen malform of uterus, third tri

This code signifies a pregnancy complicated by an unconfirmed or unspecified congenital anomaly of the uterus, with the patient currently in her third trimester. This maternal care focuses on managing the pregnancy in the presence of a structural uterine defect that was not fully characterized or diagnosed with a specific type of malformation.

Apply this code when documentation indicates a pregnant patient in her third trimester is receiving care due to a congenital uterine anomaly, but the specific type of malformation (e.g., bicornuate, septate, didelphys) is not yet identified or clearly documented. This is appropriate when the obstetrician is monitoring the pregnancy with the knowledge of an existing, but unspecified, uterine structural issue.

• Ensure the documentation explicitly states "third trimester" and "unspecified congenital malformation of uterus."
• Do not use this code if a specific type of uterine malformation (e.g., bicornuate uterus) is documented; instead, use the more specific O34.0- subcategory code.
• Always sequence this code as a secondary diagnosis, following the code for the primary reason for the encounter (e.g., routine prenatal care).