Unspecified pre-existing diabetes mellitus in childbirth

This code signifies diabetes mellitus that existed prior to the current pregnancy, where the specific type of diabetes (e.g., Type 1 or Type 2) is not documented. It applies to a patient who is currently in the process of childbirth.

Use this code for a pregnant patient delivering a baby who has a documented history of diabetes, but the medical record does not specify whether it is Type 1 or Type 2. Documentation should clearly state "pre-existing diabetes" or "diabetes in pregnancy, unspecified type."

• Always attempt to clarify the type of pre-existing diabetes (Type 1 or Type 2) with the provider to use a more specific code.
• This code is for the mother's condition during childbirth; do not use it for gestational diabetes.
• Sequence this code as a secondary diagnosis following the appropriate obstetrical encounter code.