
ICD-10-CM is a classification system used to group diagnosis codes for reimbursement and healthcare management purposes. E65 is a billable diagnosis code used to specify a medical diagnosis of localized adiposity. Localized adiposity refers to obesity, which is a condition characterized by an excessively high accumulation of body fat or adipose tissue. Obesity is typically defined as having a body mass index (BMI) of 30 or higher, and it increases the risk of various health issues such as diabetes, heart disease, and certain types of cancer. The E65 code falls within the category of codes related to overweight and obesity, which include E64, E66, and others. These codes help standardize the way hospitals and healthcare providers are reimbursed for inpatient services related to obesity and its associated conditions.
| Characteristics | Values |
|---|---|
| Diagnosis Code | E65 |
| Diagnosis | Localized adiposity |
| Code Type | Billable/specific |
| Effective Date | 1 October 2024 |
| Code Group | Diagnostic Related Group(s) (MS-DRG v42.0) |
| Code Group Number | 640, 641 |
| Code Group Name | Miscellaneous disorders of nutrition, metabolism, fluids and electrolytes with/without mcc |
| Synonyms | Obesity, overweight |
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What You'll Learn

Localized adiposity
E65 is a billable diagnosis code used to specify a medical diagnosis of localized adiposity. This code is valid for use from October 1, 2024, through September 30, 2025, for the submission of HIPAA-covered transactions.
The distribution of body fat is influenced by genetic makeup, epigenetic mechanisms, sex hormones, and the use of glucocorticoids. To address localized adiposity, a reduction in calorie consumption, a balanced diet, and lifestyle changes are recommended. Additionally, new treatments are being explored, such as the use of injectable solutions containing ascorbic acid and ascorbyl-palmitate.
In the ICD-10-CM classification system, E65 is categorized within Diagnostic Related Groups (DRGs) related to miscellaneous disorders of nutrition, metabolism, fluids, and electrolytes. This grouping is used for reimbursement purposes and standardizing inpatient service payments.
It is important to note that obesity, which refers to having excess body fat, differs from being overweight, which is determined by weight relative to height. Obesity increases the risk of various health conditions, including diabetes, heart disease, stroke, arthritis, and certain types of cancer. Losing even a small percentage of weight can help delay or prevent these diseases.
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Reimbursement purposes
The ICD-10-CM diagnosis code E65 refers to localized adiposity. It is a billable diagnosis code that can be used to specify a medical diagnosis of localized adiposity. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 1, 2024, through September 30, 2025. This code can be used for reimbursement purposes and is grouped within Diagnostic Related Groups (DRGs).
DRGs are a classification system used to group diagnosis codes for reimbursement and healthcare management purposes. They standardize the way hospitals and providers are reimbursed for inpatient services. Patients are grouped based on their principal diagnosis in Major Diagnostic Categories (MDCs). Once a patient is assigned a particular diagnostic category, providers receive a predetermined payment rate for the services rendered. This reimbursement rate is often fixed and meant to cover the cost of care for that patient. The relative weight of a DRG determines the reimbursement rate based on the severity of the patient's illness and the associated cost of care during hospitalization.
For example, the ICD-10-CM diagnosis code E66.01 refers to morbid (severe) obesity due to excess calories. It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of this code became effective on October 1, 2024. Reimbursement claims with a date of service on or after October 1, 2015, require the use of ICD-10-CM codes.
It is important to note that the ICD-10-CM codes may vary internationally, and the information provided here specifically refers to the American ICD-10-CM version.
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Obesity and being overweight
ICD-10, the 10th revision of the International Statistical Classification of Diseases and Related Health Problems, provides diagnosis codes for obesity and being overweight. These codes facilitate the classification and treatment of these conditions. One specific code, E65, denotes "localized adiposity". This code is billable and valid for use in the fiscal year 2024-2025 for HIPAA-covered transactions. It falls under the category of "Miscellaneous disorders of nutrition, metabolism, fluids, and electrolytes".
In the context of pediatric care, ICD-10 offers tailored codes to address obesity in younger populations, taking into account unique factors influencing obesity in children and adolescents. The coding system also includes codes for unspecified obesity, recognizing that the precise cause may not always be evident or documented. Additionally, there are codes related to obesity caused by excess calorie intake, enabling targeted treatment and intervention strategies.
It is important to note that ICD-10 diagnosis codes are subject to updates and revisions. As of 2025, the list of codes for obesity includes, but is not limited to, the following:
- E65 - Localized adiposity
- E66.01 - Drug-induced obesity
- E66.2 - Obesity with hyperphagia
- E66.8 - Other obesity due to excess calorie intake
- E66.9 - Obesity, unspecified
These codes play a crucial role in optimizing patient care and reimbursement processes, helping healthcare providers understand patients' health needs and develop effective treatment plans.
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Chronic conditions
ICD-10-CM diagnosis code E65 is used to specify a medical diagnosis of localized adiposity. Localized adiposity refers to obesity, which means having too much body fat. Obesity is distinct from being overweight, which refers solely to weighing too much, regardless of the source of that weight. Obesity, on the other hand, specifically refers to excess body fat, which can increase an individual's risk of developing diabetes, heart disease, stroke, arthritis, and certain types of cancer.
As a chronic condition, obesity falls under the ICD-10-CM code E65, which indicates a condition lasting 12 months or longer. This classification is based on the ongoing intervention needed to manage the condition, including the use of medical products, treatments, services, and special equipment. The code is valid for reimbursement purposes and is applicable during the fiscal year 2024, from October 1, 2023, through September 30, 2024.
The code E65 is also used to group patients with similar diagnoses into Major Diagnostic Categories (MDC) for reimbursement and healthcare management purposes. This grouping is known as Diagnostic Related Groups (DRGs). Once a patient is assigned to a particular diagnostic category, providers receive a predetermined payment rate for the services rendered. This reimbursement rate is intended to cover the cost of care for that patient.
It is important to note that the ICD-10-CM code E65 is specific to the United States and may differ from international versions of the ICD-10 classification. Additionally, the code is subject to periodic updates and revisions, with the 2025 edition of ICD-10-CM E65 becoming effective on October 1, 2024. This code is valid for the submission of HIPAA-covered transactions during the fiscal year 2025, from October 1, 2024, through September 30, 2025.
In conclusion, ICD-10-CM diagnosis code E65 is used to indicate localized adiposity or obesity as a chronic condition. It is applicable for reimbursement and healthcare management purposes and is subject to periodic updates and specific versions in different countries. Individuals with obesity may improve their health outcomes by losing even a small percentage of their total body weight.
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Body mass index
ICD-10-CM diagnosis code E65 refers to localized adiposity. Adiposity refers to obesity, which is when a person has too much body fat. Obesity is different from being overweight, which means weighing too much, regardless of whether that weight comes from muscle, bone, fat, or body water.
While BMI is a useful tool, it has some limitations and should not be the sole determinant of a person's health. For example, BMI does not differentiate between lean body mass and fat mass, so a person with a high BMI may have a low fat mass if they are muscular. Additionally, the standard BMI chart does not take into account the distribution of body fat, which is important because excess fat accumulation in certain areas, such as the abdomen, is associated with a higher risk of health conditions. Furthermore, the standard BMI chart is not suitable for evaluating the weight of children, teenagers, or adults of varying heights, as it uses the same chart for males and females, despite adult females typically having more body fat.
Despite these limitations, BMI can still be a helpful tool for healthcare providers to assess a person's risk factors and determine if further evaluation is needed. It is important for individuals to discuss their BMI and weight concerns with their healthcare provider to determine the best course of action for their overall health and well-being.
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Frequently asked questions
E65 is a diagnosis code for localized adiposity.
Localized adiposity refers to obesity, which is when a person has too much body fat. Obesity is usually due to the accumulation of excess fats in the body and can increase the risk of diabetes, heart disease, stroke, arthritis, and some cancers.
Being overweight means a person's weight is greater than what is considered healthy for their height. This weight might come from muscle, bone, fat, and/or body water. Obesity is a type of overweight that is specifically due to excess body fat.
E66 is the ICD-10 code for overweight and obesity. E66.01 is a specific code for morbid (severe) obesity due to excess calories.
E65 refers to localized adiposity, which means obesity. E66 is a broader category that includes both overweight and obesity.











































