ICD-10-CM category
E66: Overweight and obesity
Codes under E66 (Overweight and obesity). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| E66.0 | Obesity due to excess calories | — |
| E66.01 | Morbid (severe) obesity due to excess calories | ✓ |
| E66.1 | Drug-induced obesity | ✓ |
| E66.2 | Morbid (severe) obesity with alveolar hypoventilation | ✓ |
| E66.3 | Overweight | ✓ |
| E66.8 | Other obesity | — |
| E66.09 | Other obesity due to excess calories | ✓ |
| E66.9 | Obesity, unspecified | ✓ |
| E66.81 | Obesity class | — |
| E66.89 | Other obesity not elsewhere classified | ✓ |
| E66.811 | Obesity, class 1 | ✓ |
| E66.812 | Obesity, class 2 | ✓ |
| E66.813 | Obesity, class 3 | ✓ |
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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