O24.0Header code — not billable
Pre-existing type 1 diabetes mellitus, in pregnancy, childbirth and the puerperium
Short description: Pre-exist type 1 diabetes, in preg, chldbrth and the puerp
- Chapter
- 15. Pregnancy, childbirth and the puerperium
- Category
- O24
- Effective date
- October 1, 2026
Related codes in category O24
O24Diabetes in pregnancy, childbirth, and the puerperiumO24.01Pre-existing type 1 diabetes mellitus, in pregnancyO24.011Pre-existing type 1 diabetes, in pregnancy, first trimesterYesO24.012Pre-existing type 1 diabetes, in pregnancy, second trimesterYesO24.013Pre-existing type 1 diabetes, in pregnancy, third trimesterYesO24.019Pre-exist type 1 diabetes, in pregnancy, unsp trimesterYesO24.02Pre-existing type 1 diabetes mellitus, in childbirthYesO24.03Pre-existing type 1 diabetes mellitus, in the puerperiumYesO24.1Pre-exist type 2 diabetes, in preg, chldbrth and the puerpO24.11Pre-existing type 2 diabetes mellitus, in pregnancyO24.111Pre-existing type 2 diabetes, in pregnancy, first trimesterYesO24.112Pre-existing type 2 diabetes, in pregnancy, second trimesterYes
Frequently asked questions
What is ICD-10 code O24.0?
O24.0 is an ICD-10-CM diagnosis code for Pre-existing type 1 diabetes mellitus, in pregnancy, childbirth and the puerperium.
Is O24.0 a billable code?
No. O24.0 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is O24.0 in?
O24.0 falls under Chapter 15: Pregnancy, childbirth and the puerperium.
When did O24.0 become effective?
O24.0 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to O24.0?
O24.0 belongs to category O24, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.