E66.01

Billable

Morbid (severe) obesity due to excess calories

E66.01 is the ICD-10-CM code for Morbid (severe) obesity due to excess calories. It is a billable, specific code valid for reimbursement.

Status
Billable
Chapter
E00-E89
Parent
E66.0
Edition
FY2026

E00-E89 Endocrine, nutritional and metabolic diseases

Excludes1 — not coded here

  • morbid (severe) obesity with alveolar hypoventilation (E66.2)

Frequently asked questions

What is ICD-10 code E66.01?
E66.01 is the ICD-10-CM code for "Morbid (severe) obesity due to excess calories". It falls under E00-E89 Endocrine, nutritional and metabolic diseases.
Is E66.01 a billable code?
Yes — E66.01 is a billable, specific ICD-10-CM code valid for reimbursement.
What is excluded from E66.01?
Excludes1 (not coded here): morbid (severe) obesity with alveolar hypoventilation (E66.2).

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

Look up another ICD-10 code or condition

Powered by Eleplan

Free ICD-10 lookup is just the start. Eleplan keeps the whole care plan in one place.

Diagnoses, medications, documents, appointments, and the whole care team — organized and always in sync, with Ellie, your AI care assistant, on top of it. Free to start.