E66.01
Morbid (severe) obesity due to excess calories
Endocrine, nutritional and metabolic diseases Billable
Quick Reference
BMI ≥40 or BMI ≥35 with obesity-related comorbidities
Clinical Information
When to Use This Code
BMI ≥40 or BMI ≥35 with obesity-related comorbidities
Common Clinical Scenarios
- Bariatric surgery evaluation
- Severe obesity with comorbidities
- Class III obesity management
- Morbid obesity with diabetes or hypertension
Documentation Requirements
- Document BMI ≥40 or ≥35 with comorbidities
- Record weight and height measurements
- Note obesity-related conditions (diabetes, sleep apnea, OA)
- Document weight loss attempts and outcomes
Coding Guidelines
Inclusion Terms
These terms are included in this code:
Morbid obesitySevere obesityClass III obesityBMI ≥40
Exclusion Terms
Do NOT use this code for:
- Obesity without morbid classification (E66.9)
- Overweight (E66.3)
- Drug-induced obesity (E66.1)
Coding Notes
Requires BMI ≥40 or ≥35 with comorbidity
Use Z68.- codes for specific BMI documentation
Qualifies for bariatric surgery coverage criteria
Related ICD-10 Codes
Consider these related codes based on patient presentation:
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Code
E66.01
Category
Endocrine, nutritional and metabolic diseases
Billable Status
Billable
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