ICD-10 Diagnosis Code E66.2

Morbid (severe) obesity with alveolar hypoventilation

Diagnosis Code E66.2

ICD-10: E66.2
Short Description: Morbid (severe) obesity with alveolar hypoventilation
Long Description: Morbid (severe) obesity with alveolar hypoventilation
This is the 2017 version of the ICD-10-CM diagnosis code E66.2

Code Classification
  • Endocrine, nutritional and metabolic diseases
    • Overweight, obesity and other hyperalimentation (E65-E68)
      • Overweight and obesity (E66)

Information for Medical Professionals

Diagnostic Related Groups
The diagnosis code E66.2 is grouped in the following Diagnostic Related Group(s) (MS-DRG v33.0)


Convert to ICD-9 Additional informationCallout TooltipGeneral Equivalence Map
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.
  • 278.03 - Obesity hypovent synd

  • Extreme obesity with alveolar hypoventilation
  • Morbid obesity

Index of Diseases and Injuries
References found for the code E66.2 in the Index of Diseases and Injuries:

Information for Patients


Obesity means having too much body fat. It is different from being overweight, which means weighing too much. The weight may come from muscle, bone, fat, and/or body water. Both terms mean that a person's weight is greater than what's considered healthy for his or her height.

Obesity occurs over time when you eat more calories than you use. The balance between calories-in and calories-out differs for each person. Factors that might affect your weight include your genetic makeup, overeating, eating high-fat foods, and not being physically active.

Being obese increases your risk of diabetes, heart disease, stroke, arthritis, and some cancers. If you are obese, losing even 5 to 10 percent of your weight can delay or prevent some of these diseases. For example, that means losing 10 to 20 pounds if you weigh 200 pounds.

NIH: National Institute of Diabetes and Digestive and Kidney Diseases

  • Body mass index
  • Health risks of obesity
  • Obesity
  • Obesity hypoventilation syndrome (OHS)
  • Understanding Adult Overweight and Obesity - NIH (National Institute of Diabetes and Digestive and Kidney Diseases)

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