Oth pre-existing diabetes in pregnancy, second trimester

This code signifies a pregnant patient in her second trimester who has a pre-existing form of diabetes mellitus other than Type 1 or Type 2. This includes conditions like secondary diabetes due to cystic fibrosis or pancreatectomy, or other specified types of diabetes that existed prior to the current pregnancy.

Apply this code when documentation clearly indicates a pregnant patient in her second trimester with a pre-existing diabetes type not classified as Type 1 or Type 2. Supporting documentation would include a confirmed diagnosis of a specific "other" type of diabetes mellitus and a clear indication of the second trimester of pregnancy.

• Always sequence this code first when the diabetes is the primary reason for the encounter.
• Do not use this code for gestational diabetes, Type 1, or Type 2 diabetes.
• Ensure the medical record explicitly states "second trimester" for accurate trimester assignment.