E66.01
BillableMorbid (severe) obesity due to excess calories
E66.01 is the ICD-10-CM code for Morbid (severe) obesity due to excess calories. It is a billable, specific code valid for reimbursement.
E00-E89 Endocrine, nutritional and metabolic diseases
What this means — in plain language
MedlinePlus · NIHWhat is obesity? Obesity is a disease that means having too much body fat. It is different from being overweight, which means weighing too much. Both terms mean that your weight is greater than what's considered healthy for your height. Body Mass Index (BMI) measures how much you weigh compared to how tall you are. An adult who has a BMI of 30 or more is considered to have obesity. Severe obesity is having a BMI of…
Read more about Obesity at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Excludes1 — not coded here
- •morbid (severe) obesity with alveolar hypoventilation (E66.2)
Frequently asked questions
- What is ICD-10 code E66.01?
- E66.01 is the ICD-10-CM code for "Morbid (severe) obesity due to excess calories". It falls under E00-E89 Endocrine, nutritional and metabolic diseases.
- Is E66.01 a billable code?
- Yes — E66.01 is a billable, specific ICD-10-CM code valid for reimbursement.
- What is excluded from E66.01?
- Excludes1 (not coded here): morbid (severe) obesity with alveolar hypoventilation (E66.2).
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
Look up another ICD-10 code or condition