ICD-10-CM code · FY2027

E66.2 Morbid (severe) obesity with alveolar hypoventilation

BillableValid for claims as a specific diagnosis code

About E66.2

Code: E66.2
Billable: Yes
Short description: Morbid (severe) obesity with alveolar hypoventilation
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 E66.2

Applicable to Other names for conditions reported with this code.

Obesity hypoventilation syndrome (OHS)
Pickwickian syndrome

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

E66.0 Obesity due to excess caloriesHeader
E66.1 Drug-induced obesityBillable
E66.3 OverweightBillable
E66.8 Other obesityHeader
E66.9 Obesity, unspecifiedBillable

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ICD-10-CM FY2027 code set, as published by the CDC National Center for Health Statistics (NCHS) and CMS, effective October 1, 2026 to September 30, 2027. Codes, titles and notes are shown as published. Check payer rules and the official guidelines before billing. This page is not medical advice.