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  6. 2024 ICD-10-CM Code E66
Version 2024
Non-Billable Code

2024 ICD-10-CM Diagnosis Code E66

Overweight and obesity

ICD-10-CM Code:
E66
ICD-10 Code for:
Overweight and obesity
Is Billable?
Not Valid for Submission
Code Navigator:

Code Classification

  • Endocrine, nutritional and metabolic diseases
    (E00–E89)
    • Overweight, obesity and other hyperalimentation
      (E65-E68)
      • Overweight and obesity
        (E66)

E66 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of overweight and obesity. The code is not specific and is NOT valid for the year 2024 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding Applicable to Overweight and obesity

Non-specific codes like E66 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for overweight and obesity:

  • E66.0 for Obesity due to excess calories - NON-BILLABLE CODE

  • Use E66.01 for Morbid (severe) obesity due to excess calories - BILLABLE CODE

  • Use E66.09 for Other obesity due to excess calories - BILLABLE CODE

  • Use E66.1 for Drug-induced obesity - BILLABLE CODE

  • Use E66.2 for Morbid (severe) obesity with alveolar hypoventilation - BILLABLE CODE

  • Use E66.3 for Overweight - BILLABLE CODE

  • Use E66.8 for Other obesity - BILLABLE CODE

  • Use E66.9 for Obesity, unspecified - BILLABLE CODE

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.


Code First

Code First
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
  • obesity complicating pregnancy, childbirth and the puerperium, if applicable O99.21

Use Additional Code

Use Additional Code
The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.
  • code to identify body mass index BMI, if known Z68

Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • adiposogenital dystrophy E23.6
  • lipomatosis NOS E88.2
  • lipomatosis dolorosa Dercum E88.2
  • Prader-Willi syndrome Q87.11

Patient Education


Obesity

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% 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


[Learn More in MedlinePlus]

Food Portions: Choosing Just Enough for You

For a healthy weight, learn to read a Nutrition Facts label, understand how portions and servings differ, and choose the right amount of food for you.
[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.