ICD-10 Code E66.812 – Obesity, class 2 (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E66.812 – Obesity, class 2
What it is
E66.812 identifies class 2 obesity, a diagnosis used when documentation specifies this obesity category. It tells you the patient has obesity at a defined severity level, not just excess weight.
Clinical signs
Clinical features vary; refer to documentation. Commonly, the record notes a body mass index in the class 2 obesity range or an explicit provider statement of class 2 obesity.
When to use this code
Use E66.812 when the clinician documents class 2 obesity or equivalent wording in the assessment. It is appropriate for encounters where obesity is a reportable diagnosis and the severity is clearly stated. If the record only says obesity, check documentation before assigning this code.
Do not use for
Do not use this code for unspecified obesity or when the chart does not support class 2 severity. Do not guess the category from appearance alone; check documentation.
Coding tip
Code the highest documented obesity class only when the provider clearly identifies it.