2026 ICD-10-CM Diagnosis Code F50.9Eating disorder, unspecified
ICD-10-CM Codes›F01–F99›F50-F59›F50
- Billable — Valid for Submission
- Not Chronic
F50.9 is a billable ICD-10-CM diagnosis code for eating disorder, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). Coders also document this condition as atypical anorexia nervosa. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Feeding and eating disorders.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Atypical anorexia nervosa
- Atypical bulimia nervosa
- Bulimia nervosa
- Eating disorder
- Eating disorder in remission
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Atypical anorexia nervosa
- Atypical bulimia nervosa
- Feeding or eating disorder, unspecified
- Other specified feeding disorder
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- psychogenic - F50.9
- atypical - F50.9
- normal weight - F50.9
- Disorder (of) - See Also: Disease;
- eating (adult) (psychogenic) - F50.9
- feeding (infant or child) - See Also: Disorder, eating; - R63.30
- or eating disorder - F50.9
- specified NEC - F50.9
- psychogenic NOS - See Also: condition; - F45.9
- appetite - F50.9
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Anorexia
- nervosa
- atypical
- Aphagia
- psychogenic
- Bulimia(nervosa)
- atypical
- Bulimia(nervosa)
- normal weight
- Disorder(of)
- eating (adult) (psychogenic)
- Disorder(of)
- feeding (infant or child)
- or eating disorder
- Disorder(of)
- feeding (infant or child)
- specified NEC
- Disorder(of)
- psychogenic NOS
- appetite
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Bulimia Nervosa
an eating disorder that is characterized by a cycle of binge eating (bulimia or bingeing) followed by inappropriate acts (purging) to avert weight gain. purging methods often include self-induced vomiting, use of laxatives or diuretics, excessive exercise, and fasting.Eating Disorder Service Type|Eating Disorder|Eating Disorder
the service type that is associated with the health level 7 fast healthcare interoperability resources eating disorder code.Eating Disorder
a broad group of psychological disorders with abnormal eating behaviors leading to physiological effects from overeating or insufficient food intake.NPI - Appetite and Eating Disorders Distress|NPI1-Appetite/Eating Disorder Distress|NPI1-Appetite/Eating Disorder Distress|NPI1L11
neuropsychiatric inventory (npi) appetite and eating disorders: how emotionally distressing do you find this behavior?NPI - Appetite and Eating Disorders Frequency|NPI1-Appetite/Eating Disorder Frequency|NPI1-Appetite/Eating Disorder Frequency|NPI1L09
neuropsychiatric inventory (npi) frequency of the changes in eating habits or appetite.NPI - Appetite and Eating Disorders Severity|NPI1-Appetite/Eating Disorder Severity|NPI1-Appetite/Eating Disorder Severity|NPI1L10
neuropsychiatric inventory (npi) severity of the changes in eating habits or appetite.NPI - Appetite/Eating Disorders FxS Score|NPI1-Appetite/Eating Disorders FxS Score|NPI1-Appetite/Eating Disorders FxS Score|NPI1LFS
neuropsychiatric inventory (npi) appetite and eating disorders: (frequency score x severity score).Pica Eating Disorder|Pica|Pica
an eating disorder characterized by the persistent eating of nonnutritive substances such as clay or soil; this behavior must be inappropriate to the level of the individual's development.Sleep Related Eating Disorder
eating during sleep.
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 F50.9 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About F50.9Overview
Is F50.9 (Eating disorders) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report eating disorder, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What is the ICD-9 equivalent of F50.9?
Under the General Equivalence Mappings, eating disorder, unspecified converts to ICD-9-CM 307.50 (eating disorder NOS). The mapping is a direct match.
Footnotes
[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.
