ICD-10-CM diagnosis code
O24.420 Gestational diabetes mellitus in childbirth, diet controlled
- Billable
- Yes, a complete code (FY2026)
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Other codes in O24
42 complete codes in this category.
- O24.32Unspecified pre-existing diabetes mellitus in childbirth
- O24.33Unspecified pre-existing diabetes mellitus in the puerperium
- O24.410Gestational diabetes mellitus in pregnancy, diet controlled
- O24.414Gestational diabetes mellitus in pregnancy, insulin controlled
- O24.415Gestational diabetes mellitus in pregnancy, controlled by oral hypoglycemic drugs
- O24.419Gestational diabetes mellitus in pregnancy, unspecified control
- O24.420Gestational diabetes mellitus in childbirth, diet controlled
- O24.424Gestational diabetes mellitus in childbirth, insulin controlled
- O24.425Gestational diabetes mellitus in childbirth, controlled by oral hypoglycemic drugs
- O24.429Gestational diabetes mellitus in childbirth, unspecified control
- O24.430Gestational diabetes mellitus in the puerperium, diet controlled
- O24.434Gestational diabetes mellitus in the puerperium, insulin controlled
Documentation tips
- Make sure the note supports every element of the title, “Gestational diabetes mellitus in childbirth, diet controlled”: each detail in it should be traceable to the history, examination or assessment.
- Code to the highest specificity the documentation supports. If a detail is missing from the note, add it to the note rather than choosing a less specific code by default.
- Check the Tabular List and official guidelines for instructional notes (“code first”, “use additional code”, Excludes1/Excludes2) that apply to O24.
The international WHO ICD-10 also has O24, with its inclusion and exclusion notes; titles and detail can differ from ICD-10-CM.
ICD-10-CM is developed by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, and is based on the WHO ICD-10. Codes and titles are reproduced unchanged from the FY2026 code list (effective 1 October 2025). Their use here does not imply endorsement by CDC, HHS or the U.S. Government. Changes effective on or after 1 October 2026 may not be reflected yet; check the current release at cdc.gov or cms.gov before submitting claims.
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