ICD-10 Code F50.013 – Anorexia nervosa, restricting type, extreme (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F50.013 – Anorexia nervosa, restricting type, extreme
What it is
F50.013 identifies anorexia nervosa, restricting type, with extreme severity. Use it when documentation states the patient restricts food intake without regular bingeing or purging and the condition is described as extreme.
Clinical signs
Typical findings include markedly restricted intake, intense fear of weight gain, and distorted body image. Clinical features vary; refer to documentation for the severity level and whether the restricting type is confirmed.
When to use this code
Use this code when the provider documents anorexia nervosa, restricting type, and explicitly notes extreme severity. It may appear in inpatient, outpatient, or behavioral health records when the diagnosis is established. If the chart does not specify severity or subtype, check documentation.
Do not use for
Do not use this code for binge-eating or purging presentations, or when anorexia nervosa is documented without restricting type. Check documentation if the record only says eating disorder, weight loss, or malnutrition.
Coding tip
Match both the subtype and severity exactly as documented before assigning F50.013.