Unspecified diabetes mellitus in pregnancy, second trimester

This code signifies a pregnant patient in her second trimester who has diabetes mellitus, but the specific type of diabetes (e.g., pre-existing type 1, type 2, or gestational) has not been documented or determined. It indicates that the diabetes is complicating the pregnancy.

Use this code when a pregnant patient in her second trimester is diagnosed with diabetes, and the medical record lacks specificity regarding the type of diabetes. Documentation should clearly state "diabetes in pregnancy" or "gestational diabetes" without further classification, and the gestational age must fall within the second trimester (weeks 14 through 27+6 days).

• Always strive for greater specificity if available; query the provider for the type of diabetes (e.g., O24.012, O24.112, O24.412).
• Ensure the documentation explicitly states "second trimester" or provides the estimated gestational age that falls within the second trimester.
• This code is a primary diagnosis when the diabetes is the reason for the encounter or a significant co-morbidity.