Unspecified diabetes mellitus in pregnancy, third trimester

This code identifies a pregnant patient in her third trimester who has a diagnosis of diabetes mellitus, but 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 pregnancy without further specification of the underlying diabetic condition.

Assign this code when the medical record clearly states "diabetes in pregnancy" or "unspecified diabetes mellitus complicating pregnancy" for a patient in her third trimester, and no further details regarding the type of diabetes are available. This code is appropriate when the provider has not specified whether the diabetes is pre-existing or gestational.

• Always query the provider for clarification on the type of diabetes if "unspecified" is documented to allow for more specific coding.
• Do not use this code if the documentation specifies gestational diabetes (O24.4-) or pre-existing diabetes (O24.0-, O24.1-, O24.3-).
• Remember to also code any associated complications of the diabetes, if documented.