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v1.0.0
ICD-10 Guide
ICD-10 CodesE66.89

E66.89

Billable

Other obesity not elsewhere classified

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/05/2025

Code Description

ICD-10 E66.89 is a billable code used to indicate a diagnosis of other obesity not elsewhere classified.

Key Diagnostic Point:

E66.89 refers to a category of obesity that does not fit into the more specific classifications of obesity defined in the ICD-10 coding system. This code is used when a patient presents with obesity that is not attributable to a known cause, such as genetic disorders, endocrine disorders, or other specific conditions. Obesity is defined as an excessive accumulation of body fat, which can lead to various health complications, including cardiovascular diseases, type 2 diabetes, and certain cancers. The Body Mass Index (BMI) is a common tool used to classify obesity, calculated by dividing a person's weight in kilograms by the square of their height in meters. A BMI of 30 or higher is generally classified as obese. Weight management strategies for patients with obesity may include lifestyle modifications, dietary changes, physical activity, and, in some cases, pharmacotherapy or surgical interventions. Accurate coding of obesity is crucial for appropriate treatment planning and reimbursement, as it often correlates with the presence of obesity-related complications.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in patient presentation and underlying causes of obesity
  • Need for comprehensive documentation to support the diagnosis
  • Differentiation from other obesity-related codes
  • Potential overlap with other conditions that may cause weight gain

Audit Risk Factors

  • Insufficient documentation of obesity-related complications
  • Failure to specify the type of obesity
  • Inconsistent BMI calculations in medical records
  • Lack of evidence for weight management interventions

Specialty Focus

Medical Specialties

Endocrinology

Documentation Requirements

Detailed patient history, including any endocrine disorders contributing to obesity.

Common Clinical Scenarios

Patients with obesity due to hormonal imbalances, such as hypothyroidism or Cushing's syndrome.

Billing Considerations

Ensure to document any endocrine evaluations or treatments that may impact obesity.

Nutrition/Dietetics

Documentation Requirements

Comprehensive dietary assessments and weight management plans.

Common Clinical Scenarios

Patients undergoing dietary interventions for obesity management.

Billing Considerations

Documenting the patient's adherence to dietary recommendations and outcomes.

Coding Guidelines

Inclusion Criteria

Use E66.89 When
  • According to ICD
  • 10 guidelines, E66
  • 89 should be used when obesity is not classified elsewhere
  • Coders must ensure that the obesity is not due to a specific condition and that all relevant documentation supports the diagnosis

Exclusion Criteria

Do NOT use E66.89 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

97802CPT Code

Medical nutrition therapy, individual, face-to-face

Clinical Scenario

Used for patients receiving dietary counseling for obesity management.

Documentation Requirements

Document the patient's dietary history and goals.

Specialty Considerations

Nutrition specialists should ensure comprehensive assessments are included.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of obesity-related conditions, improving the accuracy of diagnoses and treatment plans. E66.89 provides flexibility for cases that do not fit neatly into other categories, but it requires careful documentation to avoid misclassification.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of obesity-related conditions, improving the accuracy of diagnoses and treatment plans. E66.89 provides flexibility for cases that do not fit neatly into other categories, but it requires careful documentation to avoid misclassification.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of obesity-related conditions, improving the accuracy of diagnoses and treatment plans. E66.89 provides flexibility for cases that do not fit neatly into other categories, but it requires careful documentation to avoid misclassification.

Resources

Clinical References

  • •
    Obesity Management Guidelines

Coding & Billing References

  • •
    Obesity Management Guidelines

Frequently Asked Questions

When should I use E66.89?

E66.89 should be used when a patient presents with obesity that does not fall under more specific classifications and when there is no identifiable cause for the obesity.