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E66.01

✓ Billable

Morbid (severe) obesity due to excess calories

Endocrine, nutritional and metabolic diseases (E00-E89)

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❌ Excludes1

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Cannot be coded with E66.01

  • • morbid (severe) obesity with alveolar hypoventilation (E66.2)

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Code Information

CodeE66.01
BillableYes
ParentE66.0
CategoryEndocrine, nutritional and metabolic diseases (E00-E89)
Excludes11 rule(s)
Excludes20 note(s)

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)