ICD-10-CM · Chapter 4 · E00–E89
E66
Overweight and obesity
Endocrine, nutritional and metabolic diseases
Heads up:this is a parent code. It's typically not directly billable — you need to drill down to a more specific child code (one with additional digits) to use on a claim.
Quick facts
- Code
- E66
- Type
- Category / header (non-billable)
- ICD-10-CM chapter
- Chapter 4 — Endocrine, nutritional and metabolic diseases
- Category
- E66
- Specificity
- 3 characters
How coders use this code
ICD-10-CM E66 is a category (header) for overweight and obesity. It is generally not reported directly on a claim — coders drill down to a more specific child code (one with additional characters) that matches the documentation. Use the related codes below to find the billable code that fits, and verify against the annual NCHS/CMS guidelines.
Related codes in E66
- E66.0Obesity due to excess calories
- 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
- E66.8Other obesity
- E66.81Obesity class
- E66.811Obesity, class 1
- E66.812Obesity, class 2
- E66.813Obesity, class 3
- E66.89Other obesity not elsewhere classified
- E66.9Obesity, unspecified
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