Unsp pre-existing diabetes in pregnancy, unsp trimester

This code signifies a pregnant patient with a pre-existing diagnosis of diabetes mellitus, where the specific type of diabetes (e.g., Type 1 or Type 2) is not documented. The code also indicates that the trimester of pregnancy is not specified in the medical record. This condition requires careful management throughout pregnancy due to potential maternal and fetal complications.

Use this code when a pregnant patient has a documented history of diabetes prior to conception, but the medical record lacks specificity regarding the type of diabetes. It is also appropriate when the trimester of pregnancy is not clearly stated in the documentation. This code is supported by physician notes indicating "pre-existing diabetes in pregnancy" without further detail on type or trimester.

• Avoid using this code if the type of pre-existing diabetes (e.g., Type 1 or Type 2) is specified in the documentation; instead, use the more specific O24.0 or O24.1 series.
• Do not use this code for gestational diabetes, which develops during pregnancy; refer to the O24.4 series for those cases.
• Always strive for greater specificity regarding both the type of diabetes and the trimester of pregnancy when documentation permits, as this code represents an unspecified scenario.