ICD-10-CM · Chapter 4 · E00-E89
E66 Overweight and obesity
Excludes 2 (not included here)
- adiposogenital dystrophy (E23.6)
- lipomatosis dolorosa [Dercum] (E88.2)
- lipomatosis NOS (E88.2)
- Prader-Willi syndrome (Q87.11)
Use Additional Code
- code to identify body mass index (BMI), if known, for adults (Z68.1-Z68.45) or pediatrics (Z68.5-)
Code First
- obesity complicating pregnancy, childbirth and the puerperium, if applicable (O99.21-)
Subcodes
Each subcode links to a detail page with full clinical annotations.
| Code | Description | Billable |
|---|---|---|
| E66..0 | Obesity due to excess calories | No |
| E66..01 | Morbid (severe) obesity due to excess calories | Yes |
| E66..09 | Other obesity due to excess calories | Yes |
| E66..1 | Drug-induced obesity | Yes |
| E66..2 | Morbid (severe) obesity with alveolar hypoventilation | Yes |
| E66..3 | Overweight | Yes |
| E66..8 | Other obesity | No |
| E66..81 | Obesity class | No |
| E66..811 | Obesity, class 1 | Yes |
| E66..812 | Obesity, class 2 | Yes |
| E66..813 | Obesity, class 3 | Yes |
| E66..89 | Other obesity not elsewhere classified | Yes |
| E66..9 | Obesity, unspecified | Yes |
Plain-language term for this code
The following entry in the US Medical Glossary corresponds to ICD-10-CM category E66:
- Obesity — Obesidad
Last reviewed: September 2026