Obesity class

Not billableICD-10-CM diagnosis code.

This code exists but cannot be submitted on its own. It groups the more specific codes beneath it.

A category header for its whole life, FY2025 onwards. It has never been valid for submission on its own.

Submit one of these 3 more specific codes instead:

E66.811 Obesity, class 1
E66.812 Obesity, class 2
E66.813 Obesity, class 3

What has happened to this code

Every change the publisher made, from 2025 to now.

FY2025 Added to the code set Obesity class

Official coding rules

Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.

Inherited from E66 Overweight and obesity

Excludes2 - not included here

adiposogenital dystrophy (E23.6)
lipomatosis dolorosa [Dercum] (E88.2)
lipomatosis NOS (E88.2)
Prader-Willi syndrome (Q87.11)

Use additional code

code to identify body mass index (BMI), if known, for adults (Z68.1-Z68.45) or pediatrics (Z68.5-)

Code first

obesity complicating pregnancy, childbirth and the puerperium, if applicable (O99.21-)

Codes in the same group

Code	Description	Status
E66.89	Other obesity not elsewhere classified	Valid