Obesity ICD-10 code
The ICD-10-CM code for obesity is E66.9 — obesity, unspecified. It is billable and valid for submission on a claim. There are 14 related codes, and which one you use depends on what the documentation supports.
Also written as morbid obesity, bmi.
The mistake coders make here
E66.01 is morbid (severe) obesity due to excess calories. Obesity codes carry a 'use additional code' instruction for the BMI (Z68.-), and payers frequently look for it.
All ICD-10-CM codes for obesity
10 of 14 are billable. Green means you can submit it as-is.
| Code | Use it when |
|---|---|
| E66.9 | Obesity, unspecified |
| E66.01 | Morbid (severe) obesity due to excess calories |
| E66.09 | Other obesity due to excess calories |
| E66.3 | Overweight |
| E66 | Overweight and obesitynot billable on its own |
| E66.8 | Other obesitynot billable on its own |
| E66.81 | Obesity classnot billable on its own |
| E66.811 | Obesity, class 1 |
| E66.812 | Obesity, class 2 |
| E66.813 | Obesity, class 3 |
| E66.89 | Other obesity not elsewhere classified |
| E66.1 | Drug-induced obesity |
| E66.0 | Obesity due to excess caloriesnot billable on its own |
| E66.2 | Morbid (severe) obesity with alveolar hypoventilation |