2025 ICD-10-CM Diagnosis Code E66.89

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Other obesity not elsewhere classified

  • E66.89 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • ICD-10-CM E66.89 is a new 2025 ICD-10-CM code that became effective on October 1, 2024.
  • This is the American ICD-10-CM version of E66.89 – other international versions of ICD-10 E66.89 may differ.

ICD-10-CM Coding Rules

  • E66.89 is not usually sufficient justification for admission to an acute care hospital when used a principal diagnosis.

The following code(s) above E66.89 contain annotation back-references

 that may be applicable to E66.89:

  • E00-E89  Endocrine, nutritional and metabolic diseases
  • E66  Overweight and obesity

ICD-10-CM E66.89 is grouped within Diagnostic Related Group(s) (MS-DRG v42.0):

  • 640 Miscellaneous disorders of nutrition, metabolism, fluids and electrolytes with mcc
  • 641 Miscellaneous disorders of nutrition, metabolism, fluids and electrolytes without mcc

Code History

  • 2025 (effective 10/1/2024): New code

Diagnosis Index entries containing back-references to E66.89:

  • ObesityE66.9
    • constitutional E66.89
    • endocrine E66.89
    • endogenous E66.89
    • familial E66.89
    • glandular E66.89
    • specified type NEC E66.89
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