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ICD-10 Coding for Abnormal Glucose in Pregnancy(O99.81, O24.4)

Complete ICD-10-CM coding and documentation guide for Abnormal Glucose in Pregnancy. Includes clinical validation requirements, documentation requirements, and coding pitfalls.

Also known as:

Glucose Intolerance in PregnancyHyperglycemia in Pregnancy

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Related ICD-10 Code Ranges

Complete code families applicable to Abnormal Glucose in Pregnancy

O99.81Primary Range

Abnormal glucose complicating pregnancy, childbirth, and the puerperium

Primary code for abnormal glucose levels during pregnancy not meeting gestational diabetes criteria.

O24.4

Gestational diabetes mellitus

Used when gestational diabetes is confirmed by a 3-hour glucose tolerance test.

Code Comparison: When to Use Each Code

Compare key differences between these codes to ensure accurate selection

CodeDescriptionWhen to UseKey Documentation
O99.81Abnormal glucose complicating pregnancy, childbirth, and the puerperiumUse when glucose levels are elevated but do not meet the criteria for gestational diabetes.
  • 1-hour glucose challenge test ≥ 130-140 mg/dL without confirmatory 3-hour GTT
O24.4Gestational diabetes mellitusUse when gestational diabetes is confirmed by a 3-hour GTT.
  • 3-hour glucose tolerance test with ≥2 abnormal values

Clinical Decision Support

Always review the patient's clinical documentation thoroughly. When in doubt, choose the more specific code and ensure documentation supports it.

Key Information: ICD-10 code for abnormal glucose in pregnancy

Essential facts and insights about Abnormal Glucose in Pregnancy

The ICD-10 code for abnormal glucose in pregnancy is O99.81, used when glucose levels are elevated but do not meet gestational diabetes criteria.

Primary ICD-10-CM Codes for abnormal glucose in pregnancy

O99.81
Abnormal glucose complicating pregnancy, childbirth, and the puerperium
Non-billable Code

Decision Criteria

clinical Criteria

  • 1-hour GCT ≥ 130-140 mg/dL without confirmatory 3-hour GTT

documentation Criteria

  • Documented abnormal 1-hour GCT with normal 3-hour GTT

Applicable To

  • Glucose intolerance in pregnancy without gestational diabetes

Excludes

Clinical Validation Requirements

  • 1-hour glucose challenge test ≥ 130-140 mg/dL without confirmatory 3-hour GTT

Code-Specific Risks

  • Incorrectly coding as gestational diabetes without confirmatory testing.

Coding Notes

  • Ensure documentation specifies the type of glucose test and results.
View Full Code Details

Ancillary Codes

Additional codes that should be used in conjunction with the main diagnosis codes when applicable.

Weeks of gestation

Z3A.-
Used to specify the gestational age of the pregnancy.

Differential Codes

Alternative codes to consider when ruling out similar conditions to the primary diagnosis.

Gestational diabetes mellitus

O24.4
Confirmed by a 3-hour glucose tolerance test with ≥2 abnormal values.

Abnormal glucose complicating pregnancy

O99.81
1-hour GCT abnormal but 3-hour GTT normal.

Documentation & Coding Risks

Avoid these common documentation and coding issues when documenting Abnormal Glucose in Pregnancy to ensure proper reimbursement, maintain compliance, and reduce audit risk. These guidelines are particularly important when using ICD-10 code O99.81.

Impact

Clinical: Potential misdiagnosis of gestational diabetes., Regulatory: Non-compliance with documentation standards., Financial: Incorrect billing and potential claim denials.

Mitigation Strategy

Standardize documentation templates to include test types., Educate staff on the importance of detailed test documentation.

Impact

Reimbursement: Incorrect DRG assignment and potential overpayment., Compliance: Non-compliance with coding guidelines., Data Quality: Inaccurate clinical data representation.

Mitigation Strategy

Require 3-hour GTT documentation for O24.4.

Impact

Using O24.4 without confirmatory 3-hour GTT results.

Mitigation Strategy

Require documentation of 3-hour GTT results before coding.

Documentation errors, coding pitfalls, and audit risks are interconnected aspects of medical coding and billing. Addressing all three areas helps ensure accurate coding, optimal reimbursement, and regulatory compliance.

Frequently Asked Questions

Common questions about ICD-10 coding for Abnormal Glucose in Pregnancy, with expert answers to help guide accurate code selection and documentation.

Documentation Templates for Abnormal Glucose in Pregnancy

Use these documentation templates to ensure complete and accurate documentation for Abnormal Glucose in Pregnancy. These templates include all required elements for proper coding and billing.

Abnormal glucose detected in pregnancy

Specialty: Obstetrics

Required Elements

  • Gestational age
  • Type of glucose test
  • Test results
  • Management plan

Example Documentation

Patient at 28 weeks with 1-hour GCT = 148 mg/dL. 3-hour GTT results: fasting 89, 1-hr 182, 2-hr 142, 3-hr 128. Plan: Repeat GCT in 4 weeks.

Examples: Poor vs. Good Documentation

Poor Documentation Example
Patient has high sugar in pregnancy.
Good Documentation Example
28-week patient with 1-hour GCT = 142 mg/dL, normal 3-hour GTT. Diagnosed with abnormal glucose tolerance. Nutrition consult ordered.
Explanation
The good example provides specific test results and a clear diagnosis.

Need help with ICD-10 coding for Abnormal Glucose in Pregnancy? Ask your questions below.

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