O24.31 Unspecified pre-existing diabetes mellitus in pregnancy

⚠ Non-Billable ICD-10-CM 2026
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The ICD-10-CM code for Unspecified pre-existing diabetes mellitus in pregnancy is O24.31 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Section
O20-O29: Other maternal disorders predominantly related to pregnancy (O20-O29)
Category O24
57 codes (42 billable)
FY2026 Status
Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to O24.31:

  • Pregnancy (single) (uterine) › complicated by (care of) (management affected by) › diabetes (mellitus) › pre-existing

References

Related Codes

Parent Code

O24 Diabetes mellitus in pregnancy, childbirth, and the puerperium

More Specific Codes

O24.311 Unspecified pre-existing diabetes mellitus in pregnancy, first trimester O24.312 Unspecified pre-existing diabetes mellitus in pregnancy, second trimester O24.313 Unspecified pre-existing diabetes mellitus in pregnancy, third trimester O24.319 Unspecified pre-existing diabetes mellitus in pregnancy, unspecified trimester

Related Codes in O24

O24 Diabetes mellitus in pregnancy, childbirth, and the puerperium O24.0 Pre-existing type 1 diabetes mellitus, in pregnancy, childbirth and the puerperium O24.01 Pre-existing type 1 diabetes mellitus, in pregnancy O24.011 Pre-existing type 1 diabetes mellitus, in pregnancy, first trimester O24.012 Pre-existing type 1 diabetes mellitus, in pregnancy, second trimester O24.013 Pre-existing type 1 diabetes mellitus, in pregnancy, third trimester O24.019 Pre-existing type 1 diabetes mellitus, in pregnancy, unspecified trimester O24.02 Pre-existing type 1 diabetes mellitus, in childbirth O24.03 Pre-existing type 1 diabetes mellitus, in the puerperium O24.1 Pre-existing type 2 diabetes mellitus, in pregnancy, childbirth and the puerperium O24.11 Pre-existing type 2 diabetes mellitus, in pregnancy O24.111 Pre-existing type 2 diabetes mellitus, in pregnancy, first trimester O24.112 Pre-existing type 2 diabetes mellitus, in pregnancy, second trimester O24.113 Pre-existing type 2 diabetes mellitus, in pregnancy, third trimester O24.119 Pre-existing type 2 diabetes mellitus, in pregnancy, unspecified trimester O24.12 Pre-existing type 2 diabetes mellitus, in childbirth O24.13 Pre-existing type 2 diabetes mellitus, in the puerperium O24.3 Unspecified pre-existing diabetes mellitus in pregnancy, childbirth and the puerperium O24.311 Unspecified pre-existing diabetes mellitus in pregnancy, first trimester O24.312 Unspecified pre-existing diabetes mellitus in pregnancy, second trimester
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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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