ICD-10-CM 2027 diagnosis code

O24Diabetes mellitus in pregnancy, childbirth, and the puerperium

Not billable — use a more specific code

O24 is a header code, so it can't be reported by itself. Choose one of the 6 more specific codes beneath it.Short description: Diabetes in pregnancy, childbirth, and the puerperium

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About O24

O24 is the ICD-10-CM diagnosis code for diabetes mellitus in pregnancy, childbirth, and the puerperium. It belongs to block O20-O29 (other maternal disorders predominantly related to pregnancy) and chapter 15 (pregnancy, childbirth and the puerperium). It is a header code, so it can't be reported by itself; one of its 6 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: O24.0 (puerperium), O24.1 (puerperium), O24.3 (puerperium), O24.4 (mellitus), O24.8 (puerperium) and O24.9 (puerperium).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under O24

Notes that apply from higher levels

Instructions written at a parent level also apply to O24.

Broader instructions also apply from O20-O29 Other maternal disorders predominantly related to pregnancy and Chapter 15: Pregnancy, childbirth and the puerperium.

Codes whose notes reference O24

O99.2Excludes2
R73Excludes1

Code history

2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about O24

Is O24 billable?: No. O24 is a header code. Report one of its more specific subcodes instead.