ICD10Check
CheckerBrowseOpen

E66

⚠ Non-billable (Header)

Overweight and obesity

Endocrine, nutritional and metabolic diseases (E00-E89)

⚠️ This is a category header code — not billable. Use a more specific child code below.

Check This Code

📋 Code Instructions

  • • code to identify body mass index (BMI), if known, for adults (Z68.1-Z68.45) or pediatrics (Z68.5-)
  • • Code first: obesity complicating pregnancy, childbirth and the puerperium, if applicable (O99.21-)

⚠️ Excludes2

direct

May be coded together if both conditions coexist

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

Child Codes (6)

E66.0Obesity due to excess caloriesE66.1Drug-induced obesityE66.2Morbid (severe) obesity with alveolar hypoventilationE66.3OverweightE66.8Other obesityE66.9Obesity, unspecified

🧪 Validate Combinations

Add E66 to the Excludes Checker to validate against your full code list.

Open in Checker →

Code Information

CodeE66
BillableNo — Header code
CategoryEndocrine, nutritional and metabolic diseases (E00-E89)
Excludes10 rule(s)
Excludes24 note(s)
Child codes6

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)