Malignant neoplasm complicating pregnancy, unsp trimester

This code signifies the presence of a malignant neoplasm in a pregnant patient, where the specific trimester of pregnancy is not documented. It indicates that the malignancy is considered a complication of the pregnancy itself, requiring clinical management during the gestational period.

Use this code when a pregnant patient is diagnosed with any type of malignant neoplasm, and the medical record does not specify the trimester of pregnancy. Documentation should clearly state the presence of a malignancy and the patient's pregnant status, with no further detail on the gestational stage.

• Always attempt to query for the specific trimester to use a more precise code (O9A.111, O9A.112, O9A.113).
• This code is a secondary diagnosis; the specific type of malignant neoplasm (from Chapter 2) must be coded first.
• Do not use this code if the malignancy is in remission or cured prior to pregnancy; it must be an active complication.