Malignant neoplasm complicating pregnancy, first trimester

This code signifies the presence of a malignant neoplastic disease in a pregnant patient during her first trimester. It indicates that the malignancy is actively complicating the pregnancy, requiring specific management considerations. This is a secondary diagnosis, reflecting the impact of the cancer on the pregnancy.

Apply this code when a pregnant patient in her first trimester is diagnosed with any form of malignant neoplasm that is affecting or being affected by the pregnancy. Documentation should clearly state the presence of a malignancy and its impact on the pregnancy, along with the specific trimester.

• Always sequence the code for the specific type of malignant neoplasm as the primary diagnosis, followed by this code.
• Do not use this code for a history of malignancy that is no longer active or complicating the current pregnancy.
• Ensure the medical record explicitly states "first trimester" to support the specificity of this code.