2027 ICD-10-CM Diagnosis Code F50.84Rumination disorder in adults

ICD-10-CM Codes›F01–F99›F50-F59›F50

ICD-10-CM F50.84
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

F50.84 is a billable ICD-10-CM diagnosis code for rumination disorder in adults. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 887. The code is restricted by the Medicare Code Editor to adult patients (age 15 through 124). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Feeding and eating disorders.

F50.84 does not risk-adjust for Medicare Advantage under the CMS-HCC V28 model. It still risk-adjusts in the RxHCC Part D (V08) category 133 for payment year 2027.

Code Identity

ICD-10-CM Code
F50.84
Billable Status
Yes — Valid for Submission
Code Describes
Rumination disorder in adults
Short Description
Rumination disorder in adults
Same as the full description in the CMS dataset.
Parent Code
F50.8
Other eating disorders

Code Classification

ChapterF01–F99Mental and behavioural disorders
SectionF50-F59Behavioral syndromes associated with physiological disturbances and physical factors
CategoryF50Eating disorders
This CodeF50.84Rumination disorder in adults

Code EditsBilling

Medicare Code Editor checks that affect claim validity for F50.84.

Adult diagnoses
The Medicare Code Editor detects inconsistencies in adult cases by checking a patient's age and any diagnosis on the patient's record. The adult code edits apply to patients age range is 15–124 years inclusive (e.g., senile delirium, mature cataract).

Medicare Risk Adjustment (HCC)Billing

F50.84 does not risk-adjust for Medicare Advantage under the CMS-HCC V28 model, but it maps to payment categories in the other CMS models shown below.

CMS-HCC V28 (Medicare Advantage Payment Model)
Not mapped
no payment category in the model that pays 100% of MA risk scores
Prior Model (CMS-HCC V24)
Not mapped under V24
this diagnosis newly risk-adjusts under the V28 model
Part D (RxHCC)
RxHCC 133 — Anxiety and Other Psychiatric Disorders
also risk-adjusts in the Part D prescription drug model (V08)

Source: CMS Payment Year 2027 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to F50.84: its own notes plus those printed at F50 and Chapter 5. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From Chapter 5 (F01-F99) Mental and behavioural disorders applies to 872 codes
  • disorders of psychological development

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

  • Rumination disorder in adults, in remission

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

On F50.84 itself
  • rumination disorder in infancy and childhood (F98.21)
From F50 Eating disorders applies to 30 codes

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From F50 Eating disorders applies to 30 codes
  • feeding difficulties (R63.3-)
  • feeding disorder in infancy or childhood (F98.2-)
From Chapter 5 (F01-F99) Mental and behavioural disorders applies to 872 codes
  • symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name F50.84, its category, or a range that includes it.

Excludes1 3

These codes carry an Excludes1 note naming F50.84: they are not reported together with it, unless the two conditions are unrelated.

  • F98.21 Rumination disorder of infancy and childhood
    rumination disorder in adults (F50.84)
  • P92 Feeding problems of newborn
    eating disorders (F50.-) names F50.-, which includes this code
  • Z72.4 Inappropriate diet and eating habits
    eating disorders (F50.-) names F50.-, which includes this code

Excludes2 2

These codes carry an Excludes2 note naming F50.84: its condition is not part of those codes, and both may be reported when the patient has both.

  • F98.2 Other feeding disorders of infancy and childhood
    anorexia nervosa and other eating disorders (F50.-) names F50.-, which includes this code
  • R63.3 Feeding difficulties
    eating disorders (F50.-) names F50.-, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

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

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.

Code History & ChangesHistory

Replacement F50.84 replaces the following previously assigned code(s):

  • F50.89 - Other specified eating disorder
FY 2025AddedAdded to the ICD-10-CM code setEffective October 1, 2024.
FY 2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About F50.84Overview

What is the ICD-10 code for rumination disorder in adults?

The ICD-10-CM code for rumination disorder in adults is F50.84 (sometimes written as F5084). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is F50.84 (Other eating disorders) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report rumination disorder in adults on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does F50.84 group to?

When rumination disorder in adults is the principal diagnosis on an inpatient stay, it groups to MS-DRG 887 (other Mental Disorder Diagnoses), which carries a relative weight of 1.1154. Higher weights mean higher Medicare reimbursement.

Who can F50.84 be reported for?

The Medicare Code Editor checks rumination disorder in adults against patient demographics: this code is intended for adult patients (age 15 through 124). Claims outside these limits are flagged as inconsistent.

Can F50.84 be reported with F98.21?

Not as a rule. The Excludes1 note on F50.84 lists "rumination disorder in infancy and childhood (F98.21)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

Does F50.84 risk-adjust for Medicare Advantage payment?

Not for Medicare Advantage: F50.84 maps to no category in the CMS-HCC V28 model. It still risk-adjusts in the RxHCC Part D (V08) category 133 (Anxiety and Other Psychiatric Disorders).