ICD-10 Code E66.9: Obesity, unspecified
Endocrine, nutritional and metabolic diseases
ICD-10 code E66.9 identifies unspecified obesity when the type and severity are not further documented.
Coding guidance
The E66 category distinguishes obesity due to excess calories (E66.0-), drug-induced obesity (E66.1) and other forms.
A BMI code from Z68.- should be reported additionally when documented.
Morbid obesity has a distinct code (E66.01) with different clinical and risk-adjustment implications.
Documentation and specificity notes
- Always report an accompanying BMI code from Z68.- when documented.
- Specify morbid obesity when criteria are met. It carries different weight.
- Frequently supports medical necessity for nutritional counseling and bariatric evaluation.
Related codes
This page provides a general summary for educational purposes and is not a substitute for the official ICD-10-CM code set, the ICD-10-CM Official Guidelines for Coding and Reporting, or payer policy. Code sets are updated annually, verify against the current official release before billing.
FAQ
ICD-10 E66.9, frequently asked questions questions
- What is ICD-10 code E66.9?
- ICD-10 code E66.9 identifies unspecified obesity when the type and severity are not further documented.
- Is E66.9 a billable ICD-10 code?
- Yes. E66.9 is a billable and specific ICD-10-CM code that may be used to indicate a diagnosis for reimbursement purposes, provided documentation supports it.
- What documentation supports E66.9?
- Always report an accompanying BMI code from Z68.- when documented. Specify morbid obesity when criteria are met. It carries different weight. Frequently supports medical necessity for nutritional counseling and bariatric evaluation.
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