Is E66 a billable code?
No. E66 is a header code that groups 10 more specific codes. Use one of the billable codes listed on this page instead.
ICD-10-CM FY2027 diagnosis code
E66: Overweight and obesity
Header code: not billableValid for dates of service October 1, 2026 to September 30, 2027
E66 groups related diagnoses under overweight and obesity. It cannot be used on a claim by itself. Choose the billable code below that matches the patient's record.
Billable codes under E66
- E66.01Morbid (severe) obesity due to excess calories
- E66.09Other obesity due to excess calories
- E66.1Drug-induced obesity
- E66.2Morbid (severe) obesity with alveolar hypoventilation
- E66.3Overweight
- E66.811Obesity, class 1
- E66.812Obesity, class 2
- E66.813Obesity, class 3
- E66.89Other obesity not elsewhere classified
- E66.9Obesity, unspecified
E66 questions
What does E66 mean?
E66 is the ICD-10-CM code for Overweight and obesity. It is in chapter 4, Endocrine, nutritional and metabolic diseases (E00-E89).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.