E66.01: Morbid (severe) obesity due to excess calories
E66.01 is a billable, specific ICD-10-CM code for morbid (severe) obesity due to excess calories. It is valid for submission on a claim.
Check E66.01 with the rest of the claim: free scrubberExcludes1: never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
- morbid (severe) obesity with alveolar hypoventilation (E66.2)
Other codes that can never be billed with E66.01
Their own Excludes1 notes name this code, so the conflict is not listed above.
- R63.5Abnormal weight gain
Risk adjustment
E66.01 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 48 Morbid Obesity0.186 RAF
Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score. Look up the whole chart to see which of its HCCs the hierarchy would zero.
Medicare coverage
E66.01 is named in 10 Medicare coverage policies: 10 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.
- A52447Laparoscopic Sleeve Gastrectomy (LSG) – Medical Policy Article
- A54923Billing and Coding: Bariatric Surgery for Treatment of Co-Morbidities Conditions Related to Morbid Obesity
- A56852Billing and Coding: Laparoscopic Sleeve Gastrectomy for Severe Obesity
- A57065Billing and Coding: Outpatient Psychiatry and Psychology Services
Alphabetic index entries that lead here
- Obesity›morbid
- Obesity›severe
- Obesity›morbid›due to excess calories
- Obesity›due to›excess calories›morbid
- Obesity›due to›excess calories›severe
The condition this code belongs to
Code history
Unchanged in every release from FY2024 to FY2027.