O24.01
⚠ Non-billable (Header)Pre-existing type 1 diabetes mellitus, in pregnancy
Pregnancy, childbirth and the puerperium (O00-O9A)
⚠️ This is a category header code — not billable. Use a more specific child code below.
📋 Code Instructions
from O24.0- • code from category E10 to further identify any manifestations
✅ No additional coding notes for O24.01
Child Codes (4)
O24.011Pre-existing type 1 diabetes mellitus, in pregnancy, first trimesterO24.012Pre-existing type 1 diabetes mellitus, in pregnancy, second trimesterO24.013Pre-existing type 1 diabetes mellitus, in pregnancy, third trimesterO24.019Pre-existing type 1 diabetes mellitus, in pregnancy, unspecified trimester
🧪 Validate Combinations
Add O24.01 to the Excludes Checker to validate against your full code list.
Open in Checker →Code Information
CodeO24.01
BillableNo — Header code
ParentO24.0
CategoryPregnancy, childbirth and the puerperium (O00-O9A)
Excludes10 rule(s)
Excludes20 note(s)
Child codes4
Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)