F50.9 — Eating disorder, unspecified
F50.9 is a billable, specific ICD-10-CM code for eating disorder, unspecified. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Atypical anorexia nervosa
- Atypical bulimia nervosa
- Feeding or eating disorder, unspecified
- Other specified feeding disorder
Other codes that can never be billed with F50.9
These codes carry an Excludes1 note pointing at F50.9. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading F50.9 alone.
- R13.0Aphagia
Risk adjustment
F50.9 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
F50.9 is named in 6 Medicare coverage policies — 5 listing it as supporting medical necessity, and 1 listing it as NOT covered. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A52434Health and Behavior Assessment/Intervention – Medical Policy Articlenot covered
- A53064Billing and Coding: Outpatient Occupational Therapy
- A56937Billing and Coding: Psychiatry and Psychology Services
- A57063Billing and Coding: Diagnostic and Therapeutic Esophagogastroduodenoscopy
How F50.9 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to F50.9.
- Aphagia›psychogenic
- Bulimia›atypical
- Bulimia›normal weight
- Disorder›eating(adult) (psychogenic)
- Anorexia›nervosa›atypical
- Disorder›feeding›or eating disorder
- Disorder›feeding›specified NEC
- Disorder›psychogenic NOS›appetite
Related codes at this level
Codes that share F50. If F50.9 is not quite right, the correct code is usually one of these.
Questions about F50.9
- Is F50.9 a billable ICD-10-CM code?
- Yes. F50.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does F50.9 sit in the tabular list?
- Mental, Behavioral and Neurodevelopmental disorders (F01-F99), in the block Behavioral syndromes associated with physiological disturbances and physical factors (F50-F59).