ICD-10 Code F50.00 – Anorexia nervosa, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F50.00 – Anorexia nervosa, unspecified
What it is
Use this code for anorexia nervosa when the record confirms the disorder but does not specify a subtype. It identifies an eating disorder marked by restrictive intake and an unhealthy fear of weight gain.
Clinical signs
Clinical features vary; refer to documentation. Commonly documented findings include significant food restriction, low body weight, distorted body image, and intense concern about gaining weight.
When to use this code
Use F50.00 when the clinician diagnoses anorexia nervosa but does not document restricting type, binge-eating/purging type, or another more specific form. It also fits when the note is clear enough for anorexia nervosa, yet subtype details are absent. Check documentation if the record is incomplete.
Do not use for
Do not use this code for bulimia nervosa, avoidant/restrictive food intake disorder, or unspecified eating disorder. If the chart names a specific anorexia subtype, code that documented subtype instead.
Coding tip
Code the most specific eating-disorder diagnosis documented, and query the provider when anorexia nervosa is stated without enough detail.