ICD-10 Code F50.0 – Anorexia nervosa (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F50.0 – Anorexia nervosa
What it is
Anorexia nervosa is an eating disorder marked by restricted food intake, intense fear of gaining weight, and a distorted body image. You use this code when the diagnosis is documented and the condition is the reason for care.
Clinical signs
Common findings include significant weight loss or failure to maintain expected weight, preoccupation with weight or shape, and restrictive eating behaviors. Clinical features vary; refer to documentation.
When to use this code
Use F50.0 when the provider documents anorexia nervosa as the confirmed diagnosis, including outpatient, inpatient, and behavioral health encounters. It may also apply when the chart clearly identifies restrictive eating with the disorder. Check documentation for subtype or associated severity details if recorded.
Do not use for
Do not use this code for simple poor appetite, weight loss alone, or unspecified eating problems without a diagnosis of anorexia nervosa. Check documentation if the record instead describes another eating disorder.
Coding tip
Code the documented eating disorder diagnosis, not just the weight loss or nutritional concern.