ICD10BillableValid for clinical use

ICD-10 Code O24.33: Unspecified pre-existing diabetes mellitus in the puerperium

O24.33 is a billable ICD-10 diagnosis code used to classify Unspecified pre-existing diabetes mellitus in the puerperium in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Pregnancy, childbirth and the puerperium (O00-O9A).

Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. 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 unspecified pre-existing diabetes mellitus in the puerperium in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

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.

Code hierarchy

chapter
15Pregnancy, childbirth and the puerperium (O00-O9A)
block
O20-O29Other maternal disorders predominantly related to pregnancy
category
O24Diabetes mellitus in pregnancy, childbirth, and the puerperium
category
O24.3Unspecified pre-existing diabetes mellitus in pregnancy, childbirth and the puerperium
currentO24.3

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

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.

Coding guidelines

Common synonyms

Unspecified pre-existing diabetes mellitus in the puerperium

Frequently asked questions

Code details

CodeO24.33
SystemICD10
Display nameUnspecified pre-existing diabetes mellitus in the puerperium
ChapterPregnancy, childbirth and the puerperium (O00-O9A)
BlockOther maternal disorders predominantly related to pregnancy

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

Index terms

Matched terms
Puerperal, puerperium(complicated by, complications)

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.

ICD-10 Code O24.33 for Unspecified pre-existing diabetes mellitus in the puerperium | HealthAssure