ICD-10 Code E66.813

ICD-10-CM code E66.813 refers to "obesity, class 3." E66.813 is an International Classification of Diseases, 10th revision, Clinical Modification (ICD-10-CM) code that healthcare providers and medical billers use to document and classify the severity of obesity as class 3. It falls under the E66 category, obesity and other hyperalimentation, which includes codes related to the causes and severity of obesity.

E66.813 is a specific code for class 3 obesity and should only be assigned based on provider documentation of class 3 obesity. It typically indicates a body mass index (BMI) of 40 or higher, or a BMI of 35 or more with associated health complications. This diagnosis conveys the severity of obesity and may be used in conjunction with other obesity-related codes in ICD-10-CM chapters 4 and 15 to fully describe the condition. However, it is important to avoid using code E66.01, which refers to morbid (severe) obesity due to excess calories, in conjunction with class 3 obesity. If both class 3 obesity and morbid obesity are documented, assign only the code for class 3 obesity, as it is more specific.

Documenting E66.813 accurately helps healthcare teams understand obesity’s clinical significance in a patient’s overall health and guides appropriate interventions. It is also used in population health tracking, billing, and risk adjustment.

Patients diagnosed with E66.813 may experience:

These symptoms reflect the systemic impact of severe obesity and the importance of a multidisciplinary approach to treatment.

These related codes help refine the classification based on etiology, severity, or presence of related conditions.

Use E66.813 when documentation clearly shows the patient’s obesity severity as class 3. The provider’s assessment note should ideally:

The CMS-HCC risk adjustment model recognizes E66.813, making accurate use and documentation especially important for risk scoring in value-based care models.

These resources provide official definitions, coding updates, and examples of documentation for compliant and accurate use.

ICD-10 code E66.813 represents obesity, class 3 and is appropriate when class 3 obesity is clearly documented. Using it accurately ensures effective clinical management, compliant billing, and appropriate inclusion in risk-adjusted care models. As with all obesity-related codes, the provider’s documentation should guide final coding decisions.

Tebra’s EHR+ gives you quick searches and Systematized Nomenclature of Medicine (SNOMED) field names for efficient code documentation. Plus, Tebra automatically saves ICD-10 to SNOMED mapping for future searches, streamlining your workflow.

Discover how Tebra helps providers effortlessly document health-related issues and conditions in this detailed post.