U.S. ICD-10-CM reference · FY2026 · April
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E66Category · further specificity requiredArchived

Overweight and obesity

HierarchyE65-E68 · E66

Code-level instructions

Excludes 2
  • adiposogenital dystrophy (E23.6)
  • lipomatosis dolorosa [Dercum] (E88.2)
  • lipomatosis NOS (E88.2)
  • Prader-Willi syndrome (Q87.11)
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-)

Inherited instructions

Chapters 4 · Endocrine, nutritional and metabolic diseases (E00-E89)

Excludes 1

transitory endocrine and metabolic disorders specific to newborn (P70-P74)

Note

All neoplasms, whether functionally active or not, are classified in Chapter 2. Appropriate codes in this chapter (i.e. E05.8, E07.0, E16-E31, E34.-) may be used as additional codes to indicate either functional activity by neoplasms and ectopic endocrine tissue or hyperfunction and hypofunction of endocrine glands associated with neoplasms and other conditions classified elsewhere.

More specific codes

E66.0Obesity due to excess caloriesCategory · further specificity requiredE66.1Drug-induced obesityBillable / specificE66.2Morbid (severe) obesity with alveolar hypoventilationBillable / specificE66.3OverweightBillable / specificE66.8Other obesityCategory · further specificity requiredE66.9Obesity, unspecifiedBillable / specific
Code edition