All ICD10 Codes

E66.01

Billable
ChapterE00–E89
Ranksubcategory
Official Description

Morbid (severe) obesity due to excess calories

Metadata & Insights
  • •Billable/specific code (valid for reimbursement).
  • •Chapter 4: Endocrine, Nutritional and Metabolic Diseases (E00-E89).

Instructional Notes

Excludes1(Not coded here. Use a different code.)
  • morbid (severe) obesity with alveolar hypoventilation (E66.2)
General instructions are available for the parent sections:
View CH4 NotesView E66 Notes

Clinical Hierarchy

BillableHas subcodes
CH4Endocrine, nutritional and metabolic diseases (E00-E89)
E65-E68Overweight, obesity and other hyperalimentation (E65-E68)
E66Overweight and obesity
E66.0Obesity due to excess calories
E66.01Morbid (severe) obesity due to excess caloriesBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to E66.01:

categoryE66
Overweight and obesity
View context instructions
chapterCH4
Endocrine, nutritional and metabolic diseases (E00-E89)
View context instructions

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 640
Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes with MCC
DRG 641
Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes without MCC

Cross Reference

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