Oth pre-existing diabetes in pregnancy, first trimester

This code signifies a pregnant patient with a pre-existing form of diabetes mellitus, other than Type 1 or Type 2, diagnosed prior to conception, who is currently in her first trimester. This includes conditions such as secondary diabetes due to cystic fibrosis or pancreatectomy, or other specified types of diabetes.

Apply this code when documentation clearly indicates a pregnant patient with a pre-existing "other specified" type of diabetes (e.g., drug-induced, genetic defect of beta-cell function) and the current pregnancy is within the first trimester (weeks 0-13). Supporting documentation would include a confirmed diabetes diagnosis prior to pregnancy and gestational age.

• Always sequence this code as a primary diagnosis when the diabetes is the focus of care during pregnancy.
• Do not use this code for gestational diabetes (diabetes that develops during pregnancy) or for pre-existing Type 1 or Type 2 diabetes.
• Ensure the medical record specifies the "other" type of diabetes and the trimester for accurate coding.