Drug use complicating pregnancy, second trimester

This code signifies a maternal condition where the use of illicit drugs, prescription medications outside of medical guidance, or substance abuse during pregnancy is adversely affecting the pregnancy itself. It specifically applies when this complication is identified or managed during the second trimester. The drug use can encompass a range of substances, leading to potential risks for both the mother and the developing fetus.

Apply this code when documentation clearly indicates drug use by the pregnant patient that is complicating the pregnancy, and the encounter occurs during the second trimester. This includes scenarios where the drug use directly impacts the course of the pregnancy, fetal development, or maternal health. Supporting documentation should specify the trimester and the complicating nature of the drug use.

• Always sequence this code as a secondary diagnosis, following the primary obstetric code (e.g., O80 for delivery, or codes for specific obstetric complications).
• Ensure documentation specifies "complicating pregnancy" and the trimester to justify its use. Do not use for drug use unrelated to the pregnancy.
• Consider additional codes for specific drug dependence (e.g., F11-F19 with .20 or .21 for dependence) or specific fetal conditions resulting from maternal drug use.