ICD-10 Code E66.3 – Overweight (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E66.3 – Overweight
What it is
Overweight means body weight above the range considered healthy for a person’s height. It is a diagnosis used when documentation supports excess weight, but not obesity.
Clinical signs
Typical findings include a body mass index above the normal range and clinician documentation of excess weight. Clinical features vary; refer to documentation.
When to use this code
Use E66.3 when the provider documents overweight, excess weight, or a similar term without diagnosing obesity. It may also fit when the record clearly supports overweight as a separate condition. Do not infer the code from weight alone if documentation is unclear.
Do not use for
Do not use this code for obesity, morbid obesity, or weight gain without a documented diagnosis of overweight. Check documentation if the note only states elevated BMI or general nutritional concern.
Coding tip
Assign E66.3 only when the provider explicitly documents overweight or equivalent wording.