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ICD-10 Guide
ICD-10 CodesO24.420

O24.420

Billable

Gestational diabetes mellitus in childbirth, diet controlled

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

Code Description

ICD-10 O24.420 is a billable code used to indicate a diagnosis of gestational diabetes mellitus in childbirth, diet controlled.

Key Diagnostic Point:

Gestational diabetes mellitus (GDM) is a form of diabetes that develops during pregnancy and typically resolves after childbirth. It is characterized by glucose intolerance that is first recognized during pregnancy. The condition can lead to various complications for both the mother and the fetus, including increased risk of cesarean delivery, macrosomia, and neonatal hypoglycemia. In cases where GDM is diet-controlled, the management focuses on dietary modifications and lifestyle changes rather than pharmacological interventions such as insulin therapy. Monitoring blood glucose levels is crucial to ensure maternal and fetal well-being. Regular fetal monitoring is also essential to assess fetal growth and development, as well as to identify any potential complications early. The diagnosis of GDM is typically made through glucose tolerance testing, and it is important for healthcare providers to document the management plan, including dietary recommendations and any necessary follow-up care.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between diet-controlled and insulin-managed gestational diabetes.
  • Understanding the implications of GDM on delivery methods and fetal outcomes.
  • Documenting dietary management plans and monitoring protocols.
  • Navigating the coding guidelines for gestational diabetes in relation to other pregnancy complications.

Audit Risk Factors

  • Inadequate documentation of dietary management plans.
  • Failure to document blood glucose monitoring results.
  • Misclassification of gestational diabetes severity.
  • Lack of clear documentation regarding fetal monitoring and outcomes.

Specialty Focus

Medical Specialties

Obstetrics and Gynecology

Documentation Requirements

Documentation must include details of the patient's dietary management, glucose monitoring results, and any complications during labor.

Common Clinical Scenarios

Patients with GDM who are managed with diet alone, presenting for labor and delivery.

Billing Considerations

Ensure that all aspects of GDM management are documented to support the coding of O24.420.

Maternal-Fetal Medicine

Documentation Requirements

Comprehensive documentation of high-risk factors, including maternal obesity, previous GDM history, and fetal monitoring results.

Common Clinical Scenarios

High-risk pregnancies with GDM requiring close monitoring and potential interventions.

Billing Considerations

Special attention to the management of both maternal and fetal health is crucial for accurate coding.

Coding Guidelines

Inclusion Criteria

Use O24.420 When
  • Coders should refer to the official ICD
  • CM guidelines for obstetric coding, particularly those related to gestational diabetes
  • Accurate coding requires understanding the patient's management plan and any associated complications

Exclusion Criteria

Do NOT use O24.420 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

59400CPT Code

Global obstetric care

Clinical Scenario

Used for comprehensive care of a patient with GDM throughout pregnancy and delivery.

Documentation Requirements

Complete documentation of all prenatal visits, labor, and delivery care.

Specialty Considerations

Obstetricians should ensure all aspects of GDM management are included in the global care documentation.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of gestational diabetes, improving the accuracy of data collection and reimbursement processes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of gestational diabetes, improving the accuracy of data collection and reimbursement processes.

Reimbursement & Billing Impact

reimbursement processes.

Resources

Clinical References

  • •
    Gestational Diabetes: A Guide for Healthcare Providers

Coding & Billing References

  • •
    Gestational Diabetes: A Guide for Healthcare Providers

Frequently Asked Questions

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

Gestational diabetes develops during pregnancy and typically resolves after childbirth, while pre-existing diabetes is a chronic condition that exists before pregnancy. Accurate coding requires distinguishing between the two based on the patient's medical history and diagnostic testing.