Obesity complicating pregnancy, first trimester

This code signifies the presence of obesity in a pregnant patient during her first trimester, where the obesity is considered a complicating factor for the pregnancy. It indicates that the patient's elevated body mass index (BMI) is clinically relevant to the management or outcome of the current gestation.

Use this code when a pregnant patient in her first trimester (up to the end of the 13th week) has a documented diagnosis of obesity that the provider explicitly states is complicating the pregnancy. Documentation should clearly link the obesity to the pregnancy, such as "obesity complicating pregnancy" or "morbid obesity in first trimester pregnancy."

• Always sequence this code after the primary obstetric code (e.g., O09.- for supervision of high-risk pregnancy).
• Do not use this code if the obesity is merely noted but not documented as complicating the pregnancy; instead, use a code from the E66.- category.
• Ensure the documentation specifies "first trimester" to support the use of this specific subcategory.