2026 ICD-10-CM Diagnosis Code F50.00Anorexia nervosa, unspecified

ICD-10-CM Codes›F01–F99›F50-F59›F50

ICD-10-CM F50.00
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

F50.00 is a billable ICD-10-CM diagnosis code for anorexia nervosa, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). Coders also document this condition as anorexia nervosa. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Feeding and eating disorders.

Code Identity

ICD-10-CM Code
F50.00
Billable Status
Yes — Valid for Submission
Code Describes
Anorexia nervosa, unspecified
Short Description
Anorexia nervosa, unspecified
Same as the full description in the CMS dataset.
Parent Code
F50.0
Anorexia nervosa

Code Classification

ChapterF01–F99Mental and behavioural disorders
SectionF50-F59Behavioral syndromes associated with physiological disturbances and physical factors
CategoryF50Eating disorders
This CodeF50.00Anorexia nervosa, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Anorexia nervosa
  • Anorexia nervosa co-occurrent with dangerously low body weight
  • Anorexia nervosa co-occurrent with significantly low body weight
  • Anorexia nervosa in remission
  • Eating disorder in remission
  • Hypertrichosis in anorexia nervosa
  • Prepubertal anorexia nervosa

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Anorexia
      • nervosa

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR MBD010
Feeding and eating disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Anorexia Nervosa

    an eating disorder that is characterized by the lack or loss of appetite, known as anorexia. other features include excess fear of becoming overweight; body image disturbance; significant weight loss; refusal to maintain minimal normal weight; and amenorrhea. this disorder occurs most frequently in adolescent females. (apa, thesaurus of psychological index terms, 1994)

Patient EducationClinical

Eating Disorders

Eating disorders are serious mental health disorders. They involve severe problems with your thoughts about food and your eating behaviors. You may eat much less or much more than you need.

The full article covers:

  • What are eating disorders?
  • What are the types of eating disorders?
  • What causes eating disorders?
  • Who is at risk for eating disorders?
  • What are the symptoms of eating disorders?
  • How is eating disorders diagnosed?
  • What are the treatments for eating disorders?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert F50.00 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
307.1 Anorexia nervosa
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About F50.00Overview

Is F50.00 (Anorexia nervosa) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report anorexia nervosa, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What is the ICD-9 equivalent of F50.00?

Under the General Equivalence Mappings, anorexia nervosa, unspecified converts to ICD-9-CM 307.1 (anorexia nervosa). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.