Unsp pre-existing diabetes in pregnancy, first trimester

This code signifies a pregnant patient with a pre-existing, but unspecified type of diabetes mellitus, who is currently in her first trimester. The diabetes was present prior to the current pregnancy, and the specific type (e.g., Type 1, Type 2) has not been documented or determined.

Apply this code when a pregnant patient's medical record indicates a history of diabetes prior to conception, and the documentation specifies the first trimester of pregnancy, but lacks further detail regarding the diabetes type. This code is appropriate when the physician's assessment or patient history confirms pre-existing diabetes without specifying its classification.

• Always seek clarification from the provider if the type of pre-existing diabetes (e.g., Type 1, Type 2) is not documented, as more specific codes exist.
• Do not use this code for gestational diabetes, which develops during pregnancy; separate codes are available for that condition.
• Sequence this code as a primary diagnosis when the diabetes is the focus of the encounter, or as a secondary diagnosis when managing other pregnancy-related conditions.