E66.811 — Obesity, class 1
E66.811 is a billable, specific ICD-10-CM code for obesity, class 1. It is valid for submission on a claim.
Risk adjustment
E66.811 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
E66.811 is named in 11 Medicare coverage policies — 11 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A57065Billing and Coding: Outpatient Psychiatry and Psychology Services
- A57179Billing and Coding: Transesophageal Echocardiogram
- A57736Billing and Coding: Vitamin D Assay Testing
- A60204Billing and Coding: MolDX: Biomarker Testing for Risk Stratification in Metabolic Dysfunction-Associated Steatotic Liver Disease and Metabolic Dysfunction-Associated Steatohepatitis
How E66.811 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to E66.811.
- Obesity›class›1
Related codes at this level
Codes that share E66.81. If E66.811 is not quite right, the correct code is usually one of these.
Questions about E66.811
- Is E66.811 a billable ICD-10-CM code?
- Yes. E66.811 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does E66.811 sit in the tabular list?
- Endocrine, nutritional and metabolic diseases (E00-E89), in the block Overweight, obesity and other hyperalimentation (E65-E68).