What does ICD-10 code O24.11 mean?

ICD-10 code O24.11 is the standardized code used for pre-existing type 2 diabetes mellitus, in pregnancy in medical records and coding systems.

When is ICD-10 code O24.11 used?

Doctors, hospitals, and insurers may use ICD-10 code O24.11 when recording pre-existing type 2 diabetes mellitus, in pregnancy in a standardized format. This entry may also act as a broader category that points toward more specific child codes.

Does ICD-10 code O24.11 confirm a diagnosis?

No. A code helps standardize documentation and claims, but it should not be read as a substitute for a clinician's full assessment.

ICD10

ICD-10 Code O24.11: Pre-existing type 2 diabetes mellitus, in pregnancy

Name: ICD-10 Code O24.11: Pre-existing type 2 diabetes mellitus, in pregnancy
Creator: HealthAssure Clinical Team
Published: 2026-05-21T06:27:33.731Z

O24.11 is an ICD-10 diagnosis entry used to group records related to Pre-existing type 2 diabetes mellitus, in pregnancy. You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen. ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Pregnancy, childbirth and the puerperium (O00-O9A).

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Pregnancy, childbirth and the puerperium (O00-O9A).

When is it used?

May be used when a clinician documents pre-existing type 2 diabetes mellitus, in pregnancy in a patient's medical record.
May appear in hospital records, claims, referrals, and clinical documentation.
This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.

What it does not mean

A code alone does not explain severity, treatment plan, or outcome.
A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
This entry may represent a broader category rather than the most specific billable code.

Code hierarchy

chapter

15Pregnancy, childbirth and the puerperium (O00-O9A)

block

O20-O29Other maternal disorders predominantly related to pregnancy

Where you may see this code

You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.

Related specialists

ObstetricianGynecologistEndocrinologistMaternal-Fetal Medicine Specialist

Related tests

Oral glucose tolerance test

Often considered when assessing glucose intolerance or diabetes in pregnancy.

Hemoglobin A1c

May be reviewed alongside other pregnancy-related diabetes assessments.

Fasting blood glucose

May help review fasting glucose patterns in pregnancy-related diabetes care.

Related procedures

Obstetric ultrasound

May appear in pregnancy-related care pathways alongside diabetes monitoring.

Fetal nonstress testing

May be used in selected higher-risk pregnancy follow-up pathways.

Medical nutrition therapy

May appear in pregnancy-related diabetes management and education pathways.

Sibling codes

O24.12Pre-existing type 2 diabetes mellitus, in childbirthbillable O24.13Pre-existing type 2 diabetes mellitus, in the puerperiumbillable

Coding guidelines

Common synonyms

Pre-existing type 2 diabetes mellitus, in pregnancy

Frequently asked questions

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.