Unspecified diabetes mellitus in pregnancy, first trimester

This code signifies a pregnant patient in her first trimester diagnosed with diabetes mellitus, where the specific type of diabetes (e.g., pre-existing Type 1, Type 2, or gestational) is not documented. It indicates the presence of hyperglycemia during early pregnancy without further specification.

Apply this code when a pregnant patient in her first trimester presents with elevated blood glucose levels, and the provider's documentation simply states "diabetes in pregnancy" or "unspecified diabetes in pregnancy" without clarifying the type. This is a temporary code used when more specific information is unavailable at the time of coding.

• Always seek clarification from the provider if the type of diabetes can be determined (e.g., pre-existing Type 1, Type 2, or gestational) to use a more specific code.
• Do not use this code if the documentation clearly indicates gestational diabetes (O24.4-) or a pre-existing type of diabetes (O24.0-, O24.1-, O24.2-, O24.3-).
• Ensure the documentation explicitly states "first trimester" for accurate trimester assignment.