ICD-10-CM · Chapter 4 · E00–E89
E66.811
Obesity, class 1
Endocrine, nutritional and metabolic diseases
Quick facts
- Code
- E66.811
- Type
- Billable code
- ICD-10-CM chapter
- Chapter 4 — Endocrine, nutritional and metabolic diseases
- Category
- E66 — Overweight and obesity
- Specificity
- 6 characters
How coders use this code
ICD-10-CM E66.811 is a billable, fully specified code, so it can be reported directly on a claim to document a diagnosis of obesity, class 1. Coders assign it when the chart documentation supports this level of detail, always matching to the most specific code available and verifying against the chapter-specific guidelines published annually by NCHS/CMS.
Related codes in E66
- E66Overweight and obesity
- E66.0Obesity due to excess calories
- E66.01Morbid (severe) obesity due to excess calories
- E66.09Other obesity due to excess calories
- E66.1Drug-induced obesity
- E66.2Morbid (severe) obesity with alveolar hypoventilation
- E66.3Overweight
- E66.8Other obesity
- E66.81Obesity class
- E66.812Obesity, class 2
- E66.813Obesity, class 3
- E66.89Other obesity not elsewhere classified
- E66.9Obesity, unspecified
Want to learn coding?
Master ICD-10-CM in 90 days.
Medita's 90-day curriculum is calibrated to the CPC (AAPC), CCA, and CCS (AHIMA) exam blueprints. Day 1 is free.