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O24.3

⚠ Non-billable (Header)

Unspecified pre-existing diabetes mellitus in pregnancy, childbirth and the puerperium

Pregnancy, childbirth and the puerperium (O00-O9A)

⚠️ This is a category header code — not billable. Use a more specific child code below.

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📋 Code Instructions

  • • code (for):
  • • from category E11 to further identify any manifestation
  • • injectable non-insulin antidiabetic drugs (Z79.85)
  • • long-term (current) use of insulin (Z79.4)

Child Codes (3)

O24.31Unspecified pre-existing diabetes mellitus in pregnancyO24.32Unspecified pre-existing diabetes mellitus in childbirthO24.33Unspecified pre-existing diabetes mellitus in the puerperium

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Code Information

CodeO24.3
BillableNo — Header code
ParentO24
CategoryPregnancy, childbirth and the puerperium (O00-O9A)
Excludes10 rule(s)
Excludes20 note(s)
Child codes3

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)