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2 Minute MedicineICD-10 Lookup

ICD-10-CM code · FY2027

E66.9 Obesity, unspecified

BillableValid for claims as a specific diagnosis code

About E66.9

Code
E66.9
Billable
Yes
Short description
Obesity, unspecified
Category
E66 Overweight and obesity
Block
E65-E68 Overweight, obesity and other hyperalimentation
Chapter
4 Endocrine, nutritional and metabolic diseases
Code set
FY2027, October 1, 2026 to September 30, 2027

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Coding notes for E66.9

Applicable to Other names for conditions reported with this code.

  • Obesity NOS

Also applies, from E66 Overweight and obesity

Excludes2 Not part of this condition, but a patient can have both: report both codes when both apply.

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

Code first Report the underlying condition's code before this one.

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

Use additional code Add a second code for the detail named here.

  • code to identify body mass index (BMI), if known, for adults (Z68.1-Z68.45) or pediatrics (Z68.5-)
Chapter 4 notes (apply to every code in it)

Note

  • All neoplasms, whether functionally active or not, are classified in Chapter 2. Appropriate codes in this chapter (i.e. E05.8, E07.0, E16-E31, E34.-) may be used as additional codes to indicate either functional activity by neoplasms and ectopic endocrine tissue or hyperfunction and hypofunction of endocrine glands associated with neoplasms and other conditions classified elsewhere.

Excludes1 Not coded here: never report these together with this code (use the code given instead).

  • transitory endocrine and metabolic disorders specific to newborn (P70-P74)

Related codes in E66

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