2027 ICD-10-CM Diagnosis Code F98.4Stereotyped movement disorders

ICD-10-CM Codes›F01–F99›F90-F98›F98

ICD-10-CM F98.4
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

F98.4 is a billable ICD-10-CM diagnosis code for stereotyped movement disorders. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 887. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Neurodevelopmental disorders.

F98.4 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
F98.4
Billable Status
Yes — Valid for Submission
Code Describes
Stereotyped movement disorders
Short Description
Stereotyped movement disorders
Same as the full description in the CMS dataset.
Parent Code
F98
Other behavioral and emotional disorders with onset usually occurring in childhood and adolescence

Code Classification

ChapterF01–F99Mental and behavioural disorders
SectionF90-F98Behavioral and emotional disorders with onset usually occurring in childhood and adolescence
CategoryF98Other behavioral and emotional disorders with onset usually occurring in childhood and adolescence
This CodeF98.4Stereotyped movement disorders

Medicare Risk Adjustment (HCC)Billing

F98.4 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.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acquired nystagmus
  • Always follows the same route - stereotyped routine
  • Arranging objects in straight line - stereotyped routine
  • Clinging to special objects - stereotyped routine
  • Collecting objects - stereotyped routine
  • Complex mannerisms - stereotype
  • Flapping movements of arms
  • NRXN1-related severe neurodevelopmental disorder, motor stereotypies, chronic constipation, sleep-wake cycle disturbance
  • Palikinesia
  • Posturing routine
  • Primary stereotypy
  • Repetitive chin tapping
  • Repetitive complex twisting movements
  • Repetitive complex twisting movements of limbs
  • Repetitive complex twisting movements of whole body
  • Repetitive finger tapping
  • Repetitive flapping movements
  • Repetitive flicking movements
  • Repetitive hand wringing
  • Repetitive pressing on eyes
  • Repetitive rocking movements
  • Repetitive routines
  • Repetitive rubbing of body parts
  • Repetitive spinning movements
  • Repetitive spinning of objects
  • Repetitive spinning of whole body
  • Repetitive tapping movements
  • Repetitive tiptoe walking
  • Repetitive touching of objects
  • Repititive complex twisting of hands near eyes
  • Secondary stereotypy
  • Severe intellectual disability, progressive postnatal microcephaly, midline stereotypic hand movements syndrome
  • Severe neurodevelopmental disorder with feeding difficulties, stereotypic hand movement, bilateral cataract
  • Spasmus nutans
  • Stereotyped routines
  • Stereotypic movement disorder with self-injurious behavior
  • Stereotypic movement disorder without self-injurious behavior
  • Stereotypy habit disorder

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to F98.4: its own notes plus those printed at F98, block F90-F98, 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.

  • Stereotype/habit disorder

Excludes1

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

  • abnormal involuntary movements (R25.-)

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.

On F98.4 itself
  • compulsions in obsessive-compulsive disorder (F42.-)
  • hair plucking (F63.3)
  • movement disorders of organic origin (G20-G25)
  • nail-biting (F98.8)
  • nose-picking (F98.8)
  • stereotypies that are part of a broader psychiatric condition (F01-F95)
  • thumb-sucking (F98.8)
  • tic disorders (F95.-)
  • trichotillomania (F63.3)
From F98 Other behavioral and emotional disorders with onset usually occurring in childhood and adolescence applies to 9 codes
  • breath-holding spells (R06.89)
  • gender identity disorder of childhood (F64.2)
  • Kleine-Levin syndrome (G47.13)
  • obsessive-compulsive disorder (F42.-)
  • sleep disorders not due to a substance or known physiological condition (F51.-)
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)

Notes

General instructions on how these codes are used.

From Block F90-F98 Behavioral and emotional disorders with onset usually occurring in childhood and adolescence applies to 33 codes
  • Codes within categories F90-F98 may be used regardless of the age of a patient. These disorders generally have onset within the childhood or adolescent years, but may continue throughout life or not be diagnosed until adulthood

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

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name F98.4, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming F98.4: they are not reported together with it, unless the two conditions are unrelated.

  • R25 Abnormal involuntary movements
    stereotyped movement disorders (F98.4)

Excludes2 1

These codes carry an Excludes2 note naming F98.4: its condition is not part of those codes, and both may be reported when the patient has both.

  • F63.3 Trichotillomania
    other stereotyped movement disorder (F98.4)

Notes 1

These notes mention F98.4.

  • Block F90-F98 Behavioral and emotional disorders with onset usually occurring in childhood and adolescence
    Codes within categories F90-F98 may be used regardless of the age of a patient. These disorders generally have onset within the childhood or adolescent years, but may continue throughout life or not be diagnosed until adulthood names F90-F98, 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 MBD014
Neurodevelopmental disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Mental Disorders

Mental disorders (or mental illnesses) are conditions that affect your thinking, feeling, mood, and behavior. They may happen over a short period of time or come and go. Some can be chronic (long-lasting). They can affect your ability to relate to others and function each day..

The full article covers:

  • What are mental disorders?
  • What are some types of mental disorders?
  • What causes mental disorders?
  • Who is at risk for mental disorders?
  • How are mental disorders diagnosed?
  • What are the treatments for mental disorders?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert F98.4 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
307.3 Stereotypic movement dis
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About F98.4Overview

What is the ICD-10 code for stereotyped movement disorders?

The ICD-10-CM code for stereotyped movement disorders is F98.4 (sometimes written as F984). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is F98.4 a billable code?

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

What MS-DRG does F98.4 group to?

When stereotyped movement disorders 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.

Can F98.4 be reported with a code from R25?

Not as a rule. The Excludes1 note on F98.4 lists "abnormal involuntary movements (R25.-)". 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).

What is the ICD-9 equivalent of F98.4?

Under the General Equivalence Mappings, stereotyped movement disorders converts to ICD-9-CM 307.3 (stereotypic movement dis). The mapping is a direct match.

Does F98.4 risk-adjust for Medicare Advantage payment?

Not for Medicare Advantage: F98.4 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).