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ICD-10-CM 2027 diagnosis code

F50.9Eating disorder, unspecified

✓ Billable / specific

F50.9 is a valid, billable ICD-10-CM code for eating disorder, unspecified. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Looking up by condition? See ICD-10 code for Eating disorder.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About F50.9

F50.9 is the ICD-10-CM diagnosis code for eating disorder, unspecified. It belongs to category F50 (eating disorders), block F50-F59 (behavioral syndromes associated with physiological disturbances and physical factors) and chapter 5 (mental, Behavioral and Neurodevelopmental disorders). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within F50, choose F50.9 (Eating disorder, unspecified) only when documentation doesn't support a more specific option: Anorexia nervosa (F50.0), Bulimia nervosa (F50.2) and other eating disorders (F50.8).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 887 (Other Mental Disorder Diagnoses, relative weight 1.1139), in MDC 19 (Mental Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 307.50 (eating disorder, unspecified).

Coding notes

Applicable toConditions and synonyms classified to this code
  • Atypical anorexia nervosa
  • Atypical bulimia nervosa
  • Feeding or eating disorder, unspecified
  • Other specified feeding disorder

Notes that apply from higher levels

Instructions written at a parent level also apply to F50.9.

› From F50 Eating disorders
Excludes1
  • anorexia NOS (R63.0)
  • feeding problems of newborn (P92.-)
  • polyphagia (R63.2)
Excludes2
  • feeding difficulties (R63.3-)
  • feeding disorder in infancy or childhood (F98.2-)

Broader instructions also apply from Chapter 5: Mental, Behavioral and Neurodevelopmental disorders.

Alphabetic index entries

8 entries

Terms in the official ICD-10-CM index that lead to F50.9.

Codes whose notes reference F50.9

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

MDC 19 · Mental Diseases and Disorders

ICD-9-CM equivalent

Converter →
  • 307.50Eating disorder, unspecifiedexact

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about F50.9

Is F50.9 billable?

Yes. F50.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can F50.9 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict F50.9 as a principal diagnosis.

Is F50.9 a CC or MCC?

No. F50.9 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does F50.9 group to?

F50.9 is used in the MS-DRG v44.0 logic for MS-DRG 887 (Other Mental Disorder Diagnoses). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for F50.9?

The CMS General Equivalence Mappings map F50.9 to ICD-9-CM 307.50.