ICD-10-CM Code E66.8

Other obesity

Version 2020 Billable Code Questionable Admission Codes

Valid for Submission

E66.8 is a billable code used to specify a medical diagnosis of other obesity. The code is valid for the year 2020 for the submission of HIPAA-covered transactions. The ICD-10-CM code E66.8 might also be used to specify conditions or terms like adult-onset obesity, android obesity, aniridia, ptosis, intellectual disability, familial obesity syndrome, buffalo obesity, central obesity, central obesity, etc

The code E66.8 is not usually sufficient justification for admission to an acute care hospital when used as a principal diagnosis.

Short Description:Other obesity
Long Description:Other obesity

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code E66.8 are found in the index:

Code Edits

The Medicare Code Editor (MCE) detects and reports errors in the coding of claims data. The following ICD-10 Code Edits are applicable to this code:

  • Questionable admission codes - Some diagnoses are not usually sufficient justification for admission to an acute care hospital. For example, if a patient is given code R030 for elevated blood pressure reading, without diagnosis of hypertension, then the patient would have a questionable admission, since elevated blood pressure reading is not normally sufficient justification for admission to a hospital.


The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Adult-onset obesity
  • Android obesity
  • Aniridia, ptosis, intellectual disability, familial obesity syndrome
  • Buffalo obesity
  • Central obesity
  • Central obesity
  • Childhood obesity
  • Congenital hypoplasia of penis
  • Constitutional obesity
  • Endogenous obesity
  • Familial obesity
  • Gynecoid obesity
  • Hydrocephalus with obesity and hypogonadism syndrome
  • Hyperinsulinar obesity
  • Hyperplastic obesity
  • Hyperplastic-hypertrophic obesity
  • Hypertrophic obesity
  • Hypogonadal obesity
  • Hypothalamic disorder of appetite
  • Hypothalamic obesity
  • MEHMO syndrome
  • MORM syndrome
  • Obesity by adipocyte growth pattern
  • Obesity by adipocyte growth pattern
  • Obesity by adipocyte growth pattern
  • Obesity by age of onset
  • Obesity by age of onset
  • Obesity caused by energy imbalance
  • Obesity due to melanocortin 4 receptor deficiency
  • Obesity due to prohormone convertase I deficiency
  • Obesity of endocrine origin
  • Obesity, colitis, hypothyroidism, cardiac hypertrophy, developmental delay syndrome
  • Peripheral obesity
  • Pulmonary hypertension associated with chronic underventilation
  • Pulmonary hypertension due to lung disease and/or hypoxia
  • Pulmonary hypertension with extreme obesity
  • Rapid-onset childhood obesity, hypothalamic dysfunction, hypoventilation, autonomic dysregulation syndrome

Clinical Information

  • OBESITY METABOLICALLY BENIGN-. a sub phenotype of obese individuals who have a risk for cardiovascular diseases between that of healthy individuals with normal weight and unhealthy individuals with obesity.
  • OBESITY MANAGEMENT-. an integrated professional approach to screening evaluation control and reduction of abnormal weight gain.
  • OBESITY-. a status with body weight that is grossly above the acceptable or desirable weight usually due to accumulation of excess fats in the body. the standards may vary with age sex genetic or cultural background. in the body mass index a bmi greater than 30.0 kg/m2 is considered obese and a bmi greater than 40.0 kg/m2 is considered morbidly obese morbid obesity.
  • OBESITY MORBID-. the condition of weighing two three or more times the ideal weight so called because it is associated with many serious and life threatening disorders. in the body mass index morbid obesity is defined as having a bmi greater than 40.0 kg/m2.
  • OBESITY HYPOVENTILATION SYNDROME-. hypoventilation syndrome in very obese persons with excessive adipose tissue around the abdomen and diaphragm. it is characterized by diminished to absent ventilatory chemoresponsiveness; chronic hypoxia; hypercapnia; polycythemia; and long periods of sleep during day and night hypersomnolence. it is a condition often related to obstructive sleep apnea but can occur separately.
  • OBESITY ABDOMINAL-. a condition of having excess fat in the abdomen. abdominal obesity is typically defined as waist circumferences of 40 inches or more in men and 35 inches or more in women. abdominal obesity raises the risk of developing disorders such as diabetes hypertension and metabolic syndrome.
  • PEDIATRIC OBESITY-. body mass index in children ages 2 12 and in adolescents ages 13 18 that is grossly above the recommended cut off for a specific age and sex. for infants less than 2 years of age obesity is determined based on standard weight for length percentile measures.

Diagnostic Related Groups

The ICD-10 code E66.8 is grouped in the following groups for version MS-DRG V37.0 What are Diagnostic Related Groups?
The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC).
applicable from 10/01/2019 through 09/30/2020.


Convert E66.8 to ICD-9

  • 278.00 - Obesity NOS (Approximate Flag)

Code Classification

  • Endocrine, nutritional and metabolic diseases (E00–E90)
    • Overweight, obesity and other hyperalimentation (E65-E68)
      • Overweight and obesity (E66)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

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 happens 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.

Obesity increases your risk of diabetes, heart disease, stroke, arthritis, and some cancers. If you have obesity, 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

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