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v1.0.0
ICD-10 Guide
ICD-10 CodesE66.09

E66.09

Billable

Other obesity due to excess calories

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

Code Description

ICD-10 E66.09 is a billable code used to indicate a diagnosis of other obesity due to excess calories.

Key Diagnostic Point:

E66.09 refers to a specific classification of obesity that arises from excessive caloric intake, distinguishing it from other forms of obesity that may be due to genetic, hormonal, or metabolic factors. This condition is characterized by an abnormal or excessive fat accumulation that presents a risk to health. The World Health Organization defines obesity using the Body Mass Index (BMI), which is calculated by dividing a person's weight in kilograms by the square of their height in meters (kg/m²). A BMI of 30 or higher indicates obesity. Individuals with E66.09 may experience various obesity-related complications, including type 2 diabetes, cardiovascular diseases, sleep apnea, and certain types of cancer. Effective weight management strategies are crucial for these patients, often involving lifestyle modifications such as dietary changes, increased physical activity, and behavioral therapy. In some cases, pharmacotherapy or surgical interventions may be considered. Accurate coding of E66.09 is essential for appropriate treatment planning and reimbursement, as it reflects the underlying cause of the patient's obesity and guides clinical management.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between types of obesity
  • Need for precise documentation of caloric intake
  • Potential overlap with other obesity-related codes
  • Variability in BMI calculations and interpretations

Audit Risk Factors

  • Inadequate documentation of caloric intake
  • Failure to document obesity-related comorbidities
  • Incorrect BMI calculations
  • Lack of follow-up documentation for weight management

Specialty Focus

Medical Specialties

Endocrinology

Documentation Requirements

Detailed history of weight management, comorbid conditions, and treatment plans.

Common Clinical Scenarios

Patients with obesity-related metabolic disorders, such as diabetes or dyslipidemia.

Billing Considerations

Endocrinologists must document hormonal evaluations and any pharmacotherapy prescribed.

Nutrition

Documentation Requirements

Comprehensive dietary assessments and individualized nutrition plans.

Common Clinical Scenarios

Patients undergoing dietary interventions for weight loss.

Billing Considerations

Nutritionists should document patient adherence to dietary recommendations and progress.

Coding Guidelines

Inclusion Criteria

Use E66.09 When
  • According to ICD
  • CM guidelines, E66
  • 09 should be used when obesity is specifically attributed to excess caloric intake
  • It is important to document the patient's BMI and any related health conditions to support the diagnosis

Exclusion Criteria

Do NOT use E66.09 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 with obesity seeking dietary counseling.

Documentation Requirements

Document the patient's weight, BMI, and dietary history.

Specialty Considerations

Nutritionists should ensure that the therapy aligns with the patient's obesity management plan.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of obesity types, improving the accuracy of health records and reimbursement processes. E66.09 provides a clear classification for obesity due to excess calories, facilitating targeted interventions.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of obesity types, improving the accuracy of health records and reimbursement processes. E66.09 provides a clear classification for obesity due to excess calories, facilitating targeted interventions.

Reimbursement & Billing Impact

reimbursement processes. E66.09 provides a clear classification for obesity due to excess calories, facilitating targeted interventions.

Resources

Clinical References

  • •
    CDC Obesity Facts

Coding & Billing References

  • •
    CDC Obesity Facts

Frequently Asked Questions

What is the difference between E66.09 and E66.01?

E66.09 refers to other obesity due to excess calories, while E66.01 specifically denotes morbid obesity, which is characterized by a higher BMI and associated health risks.