Unspecified pre-existing diabetes mellitus in the puerperium

This code signifies diabetes mellitus that existed prior to pregnancy and is now complicating the postpartum period (puerperium), but the specific type of pre-existing diabetes (e.g., Type 1 or Type 2) is not documented. It indicates a maternal condition impacting the mother's health during the six weeks following childbirth.

Apply this code when a patient with a history of diabetes, not specified as Type 1 or Type 2, is receiving care during the puerperium for issues related to her diabetes. Documentation should clearly state "pre-existing diabetes" or "history of diabetes" and its impact or management during the postpartum period, without specifying the type.

• Always sequence this code after the primary reason for the encounter, if applicable.
• Do not use if the type of pre-existing diabetes (Type 1 or Type 2) is clearly documented; instead, use the more specific O24.0- or O24.1- codes.
• This code is for the mother's condition; do not use for gestational diabetes that developed during the current pregnancy.