ICD-10 Logo
ICDxICD-10 Medical Coding
ICD-10 Logo
ICDxICD-10 Medical Coding
ICD 10 CodesDiagnoses
ICD 10 CodesDiagnoses
ICD-10 Logo
ICDxICD-10 Medical Coding

Comprehensive ICD-10-CM code reference with AI-powered search capabilities.

© 2025 ICD Code Compass. All rights reserved.

Browse

  • All Chapters
  • All Categories
  • Diagnoses

Tools

  • AI Code Search
ICD-10-CM codes are maintained by the CDC and CMS. This tool is for reference purposes only.
v1.0.0
ICD-10 Guide
ICD-10 CodesO24.311

O24.311

Billable

Unspecified pre-existing diabetes mellitus in pregnancy, first trimester

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/08/2025

Code Description

ICD-10 O24.311 is a billable code used to indicate a diagnosis of unspecified pre-existing diabetes mellitus in pregnancy, first trimester.

Key Diagnostic Point:

Unspecified pre-existing diabetes mellitus in pregnancy during the first trimester refers to a condition where a woman has diabetes that existed prior to pregnancy but has not been specifically classified as type 1 or type 2. This condition poses unique challenges during pregnancy, as it can lead to complications for both the mother and the fetus. Women with pre-existing diabetes are at increased risk for gestational hypertension, preeclampsia, and cesarean delivery. Additionally, fetal risks include macrosomia, congenital anomalies, and neonatal hypoglycemia. Management typically involves close monitoring of blood glucose levels, dietary modifications, and possibly insulin therapy to maintain optimal glycemic control. Regular fetal monitoring is essential to assess fetal growth and well-being, especially in the context of maternal diabetes. The first trimester is a critical period for fetal development, making effective management of pre-existing diabetes crucial to minimize risks and ensure a healthy pregnancy outcome.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between type 1 and type 2 diabetes when unspecified.
  • Managing insulin therapy and adjustments during pregnancy.
  • Monitoring for potential complications such as preeclampsia.
  • Understanding the implications of diabetes on fetal development.

Audit Risk Factors

  • Inadequate documentation of diabetes management.
  • Failure to document insulin usage and adjustments.
  • Lack of clear differentiation between pre-existing and gestational diabetes.
  • Insufficient fetal monitoring records.

Specialty Focus

Medical Specialties

Obstetrics and Gynecology

Documentation Requirements

Documentation must include the patient's diabetes history, current management plan, and any complications encountered during pregnancy.

Common Clinical Scenarios

Patients with a known history of diabetes presenting for prenatal care, requiring insulin management adjustments.

Billing Considerations

Coders must ensure that all aspects of diabetes management and fetal monitoring are documented to support the coding.

Maternal-Fetal Medicine

Documentation Requirements

Detailed records of maternal-fetal assessments, including ultrasound findings and fetal growth monitoring.

Common Clinical Scenarios

High-risk pregnancies with pre-existing diabetes requiring specialized care and monitoring.

Billing Considerations

Focus on the implications of diabetes on fetal health and the need for multidisciplinary care.

Coding Guidelines

Inclusion Criteria

Use O24.311 When
  • 10 coding guidelines require that pre
  • existing conditions be documented clearly, including the type of diabetes if known
  • The first trimester is defined as weeks 1
  • 12 of gestation, and coding must reflect the timing of the diagnosis

Exclusion Criteria

Do NOT use O24.311 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

99203CPT Code

Office or other outpatient visit for the evaluation and management of a new patient

Clinical Scenario

Used during the first prenatal visit for a patient with pre-existing diabetes.

Documentation Requirements

Document the patient's diabetes history, current management, and any complications.

Specialty Considerations

Obstetricians should ensure comprehensive documentation to support the visit.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of diabetes in pregnancy, improving the ability to track and manage these conditions effectively. O24.311 provides a clear distinction for pre-existing diabetes, which is crucial for patient management and billing.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of diabetes in pregnancy, improving the ability to track and manage these conditions effectively. O24.311 provides a clear distinction for pre-existing diabetes, which is crucial for patient management and billing.

Reimbursement & Billing Impact

billing.

Resources

Clinical References

  • •
    American Diabetes Association - Diabetes and Pregnancy

Coding & Billing References

  • •
    American Diabetes Association - Diabetes and Pregnancy

Frequently Asked Questions

What is the difference between pre-existing diabetes and gestational diabetes?

Pre-existing diabetes refers to diabetes that was diagnosed before pregnancy, while gestational diabetes develops during pregnancy. Accurate coding is essential to reflect the patient's condition correctly.