Suprvsn of preg with history of molar preg, unsp trimester

This code signifies the ongoing medical oversight of a pregnant patient who has a documented history of a molar pregnancy (hydatidiform mole). It indicates that the current pregnancy is being monitored more closely due to this prior obstetric complication, without specifying the trimester of the current pregnancy.

Apply this code when a pregnant patient is receiving antenatal care and the medical record clearly states a history of a molar pregnancy. Documentation should confirm the current pregnancy is under supervision, and the specific trimester is not yet determined or not explicitly documented.

• Always sequence this code as a secondary diagnosis, following the code for the current pregnancy (e.g., Z3A.xx for weeks of gestation).
• Do not use this code if the current pregnancy is a molar pregnancy; instead, use codes from category O01.
• If the trimester of the current pregnancy is known, use the more specific codes O09.A1, O09.A2, or O09.A3.