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 CodesO26.12

O26.12

Billable

Low weight gain in pregnancy, second trimester

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

Code Description

ICD-10 O26.12 is a billable code used to indicate a diagnosis of low weight gain in pregnancy, second trimester.

Key Diagnostic Point:

Low weight gain during the second trimester of pregnancy can indicate potential complications for both the mother and fetus. This condition is characterized by insufficient weight gain, which may be influenced by various factors including maternal health conditions such as renal, cardiac, or respiratory issues. In the second trimester, the fetus undergoes significant growth, and inadequate maternal weight gain can lead to fetal growth restriction, low birth weight, and other adverse outcomes. Maternal conditions like chronic kidney disease may affect nutritional absorption, while cardiac conditions can limit physical activity and caloric intake. Respiratory issues may also contribute to fatigue and decreased appetite, further complicating weight gain. Monitoring and intervention are crucial to ensure both maternal and fetal health, and healthcare providers must assess dietary intake, nutritional status, and any underlying medical conditions that may be contributing to low weight gain.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in normal weight gain recommendations based on pre-pregnancy BMI.
  • Need for comprehensive documentation of maternal health conditions.
  • Differentiation between low weight gain due to physiological factors versus pathological conditions.
  • Potential overlap with other obstetric codes related to maternal weight issues.

Audit Risk Factors

  • Inadequate documentation of maternal health conditions.
  • Failure to document weight gain trends over time.
  • Misclassification of weight gain issues as unrelated to maternal health.
  • Lack of follow-up notes on interventions or dietary recommendations.

Specialty Focus

Medical Specialties

Obstetrics and Gynecology

Documentation Requirements

Detailed records of weight gain, maternal health assessments, and dietary evaluations.

Common Clinical Scenarios

Patients presenting with low weight gain due to nausea, vomiting, or underlying health conditions.

Billing Considerations

Consideration of cultural dietary practices and their impact on weight gain.

Maternal-Fetal Medicine

Documentation Requirements

Thorough documentation of high-risk factors, including chronic conditions and their management.

Common Clinical Scenarios

Management of pregnancies complicated by renal or cardiac conditions with associated low weight gain.

Billing Considerations

Close monitoring of fetal growth and development in relation to maternal weight gain.

Coding Guidelines

Inclusion Criteria

Use O26.12 When
  • Follow the official ICD
  • CM guidelines for coding obstetric conditions, ensuring accurate documentation of weight gain patterns and associated maternal health conditions

Exclusion Criteria

Do NOT use O26.12 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

99213CPT Code

Established patient office visit, Level 3

Clinical Scenario

Used for follow-up visits to monitor weight gain and maternal health.

Documentation Requirements

Document weight measurements, maternal health assessments, and any interventions.

Specialty Considerations

Obstetricians should ensure comprehensive notes on weight gain trends.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of obstetric conditions, improving the ability to capture the nuances of maternal health and weight gain issues during pregnancy.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of obstetric conditions, improving the ability to capture the nuances of maternal health and weight gain issues during pregnancy.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of obstetric conditions, improving the ability to capture the nuances of maternal health and weight gain issues during pregnancy.

Resources

Clinical References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Coding & Billing References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Frequently Asked Questions

What should be documented to support the use of code O26.12?

Documentation should include the patient's weight gain history, any maternal health conditions affecting weight, dietary assessments, and any interventions or referrals made to address low weight gain.