ICD-10-CM · FY 2026 APRIL UPDATE
E66
Overweight and obesity
Diagnosis reference
Nonbillable categoryThis entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.
Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification
Related entries
Up to 30 descendants in this category
| CODE | DESCRIPTION | TYPE |
|---|---|---|
| E66.0 | Obesity due to excess calories | Category |
| E66.01 | Morbid (severe) obesity due to excess calories | Billable |
| E66.09 | Other obesity due to excess calories | Billable |
| E66.1 | Drug-induced obesity | Billable |
| E66.2 | Morbid (severe) obesity with alveolar hypoventilation | Billable |
| E66.3 | Overweight | Billable |
| E66.8 | Other obesity | Category |
| E66.81 | Obesity class | Category |
| E66.811 | Obesity, class 1 | Billable |
| E66.812 | Obesity, class 2 | Billable |
| E66.813 | Obesity, class 3 | Billable |
| E66.89 | Other obesity not elsewhere classified | Billable |
| E66.9 | Obesity, unspecified | Billable |
Use the complete reference
This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.
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