E66.9 Obesity, unspecified

Coding notes

From the ICD-10-CM FY2027 (effective October 1, 2026) tabular list. Notes on a parent code or category apply here too.

Also covers

• Obesity NOS

Excludes2

Not part of this code, but both can be coded when both are documented.

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

Code first

Code the underlying condition first, then this code.

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

Use additional code

Add a second code for the following, when documented.

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