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E66 Overweight and obesity
BackE66.0Obesity due to excess caloriesCategory2 →E66.01Morbid (severe) obesity due to excess caloriesCategoryE66.09Other obesity due to excess caloriesCategoryE66.1Drug-induced obesityCategoryE66.2Morbid (severe) obesity with alveolar hypoventilationCategoryE66.3OverweightCategoryE66.8Other obesityCategory2 →E66.81Obesity classCategory3 →E66.811Obesity, class 1CategoryE66.812Obesity, class 2CategoryE66.813Obesity, class 3CategoryE66.89Other obesity not elsewhere classifiedCategoryE66.9Obesity, unspecifiedCategory
Category
E66
Overweight and obesity
EXCLUDES
Excludes2: adiposogenital dystrophy (E23.6)
lipomatosis dolorosa [Dercum] (E88.2)
lipomatosis NOS (E88.2)
Prader-Willi syndrome (Q87.11)
lipomatosis dolorosa [Dercum] (E88.2)
lipomatosis NOS (E88.2)
Prader-Willi syndrome (Q87.11)
CODING RULE
Code first: obesity complicating pregnancy, childbirth and the puerperium, if applicable (O99.21-)
Use additional code: code to identify body mass index (BMI), if known, for adults (Z68.1-Z68.45) or pediatrics (Z68.5-)
Use additional code: code to identify body mass index (BMI), if known, for adults (Z68.1-Z68.45) or pediatrics (Z68.5-)
- Chapter
- IV · Endocrine, nutritional and metabolic diseases
- Section
- E65-E68
- Valid from
Source
CMS ICD-10-CM Tabular List, edition FY2026.