Suprvsn of preg with history of molar preg, third trimester

This code signifies ongoing antenatal care for a pregnant patient who has a documented history of a molar pregnancy, currently in her third trimester. It indicates that the pregnancy is being closely monitored due to the increased risk of complications associated with a prior molar pregnancy, such as gestational trophoblastic neoplasia.

Apply this code when a pregnant patient, in her third trimester (28 weeks 0 days to delivery), is receiving routine or specialized obstetric care and her medical history includes a previous hydatidiform mole. Documentation should clearly state the patient's gestational age and the history of molar pregnancy, confirming the need for continued supervision.

• Always confirm the trimester based on the documentation of gestational age.
• Do not use this code if the current pregnancy is a molar pregnancy; use codes from category O01 instead.
• Sequence this code as a secondary diagnosis when the primary reason for the encounter is routine prenatal care (e.g., Z34.xx).