O24.31
⚠ Non-billable
Unspecified pre-existing diabetes mellitus in pregnancy
ICD-10-CM · FY2026 · Pregnancy, Childbirth and the Puerperium
Code
O24.31
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Pregnancy, Childbirth and the Puerperium
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code O24.31?
ICD-10-CM code O24.31 represents Unspecified pre-existing diabetes mellitus in pregnancy. It is a non-billable header code requiring a more specific subcategory in the Pregnancy, Childbirth and the Puerperium chapter, effective October 1, 2025 – September 30, 2026.
Is O24.31 billable?
No. O24.31 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is O24.31 in?
O24.31 belongs to the Pregnancy, Childbirth and the Puerperium chapter (O00–O9A) of ICD-10-CM.
Related codes in the O24 category
O24
Diabetes mellitus in pregnancy, childbirth, and the puerperium
Non-billable
O24.0
Pre-existing type 1 diabetes mellitus, in pregnancy, childbirth and the puerperium
Non-billable
O24.1
Pre-existing type 2 diabetes mellitus, in pregnancy, childbirth and the puerperium
Non-billable
O24.3
Unspecified pre-existing diabetes mellitus in pregnancy, childbirth and the puerperium
Non-billable
O24.4
Gestational diabetes mellitus
Non-billable
O24.8
Other pre-existing diabetes mellitus in pregnancy, childbirth, and the puerperium
Non-billable
O24.9
Unspecified diabetes mellitus in pregnancy, childbirth and the puerperium
Non-billable
O24.01
Pre-existing type 1 diabetes mellitus, in pregnancy
Non-billable
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