F50.9 — Eating disorder, unspecified
Is F50.9 billable?
Yes, but F50.9 is an unspecified code. F50.9 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, F50.9 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting F50.9 — the more specific alternatives are listed below.
More specific alternatives
F50.9 at a glance
| Code | F50.9 |
|---|---|
| Description | Eating disorder, unspecified |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does F50.9 group to?
F50.9 sits in MDC 19 and helps define the logic of 1 MS-DRG (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 887Other Mental Disorder Diagnosesmedical
How is F50.9 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to F50.9. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Aphagia › psychogenic
- Bulimia › atypical (nervosa)
- Bulimia › normal weight (nervosa)
- Disorder › eating (of)
- Anorexia › nervosa › atypical
- Disorder › feeding › or eating disorder (of)
- Disorder › feeding › specified NEC (of)
- Disorder › psychogenic NOS › appetite (of)
Inclusion terms
Alternative wording in documentation that is classified to F50.9.
- Atypical anorexia nervosa
- Atypical bulimia nervosa
- Feeding or eating disorder, unspecified
- Other specified feeding disorder
Excludes1 — never code together — inherited from F50
The conditions below can never be reported together with F50.9 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes2 — not included here — inherited from Chapter 5
The conditions below are not part of F50.9, but a patient may have both at the same time. When documentation supports it, F50.9 and the excluded code may both be reported.
- symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)
Excludes2 — not included here — inherited from F50
The conditions below are not part of F50.9, but a patient may have both at the same time. When documentation supports it, F50.9 and the excluded code may both be reported.
How long has F50.9 existed?
F50.9 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
Which codes are confused with F50.9?
ICD-10-CM declares these codes mutually exclusive with F50.9 — exactly one of each pair can be correct for a given encounter.