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E66.81

Non-billable

Obesity class

E66.81 is the ICD-10-CM code for Obesity class. It is a non-billable category code — use a more specific child code such as E66.811 for billing.

Status
Header (non-billable)
Chapter
E00-E89
Parent
E66.8
Subcodes
3
Edition
FY2026

E00-E89 Endocrine, nutritional and metabolic diseases

No additional coding notes for this code.

Frequently asked questions

What is ICD-10 code E66.81?
E66.81 is the ICD-10-CM code for "Obesity class". It falls under E00-E89 Endocrine, nutritional and metabolic diseases.
Is E66.81 a billable code?
No — E66.81 is a non-billable header code. Use a more specific child code (such as E66.811) for billing.
What are the subcodes of E66.81?
E66.81 has 3 more specific child codes, including E66.811, E66.812, E66.813.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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