2027 ICD-10-CM Diagnosis Code G25.5Other chorea

ICD-10-CM Codes›G00–G99›G20-G26›G25

ICD-10-CM G25.5
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

G25.5 is a billable ICD-10-CM diagnosis code for other chorea. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 56 through 57. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other nervous system disorders (often hereditary or degenerative).

Code Identity

ICD-10-CM Code
G25.5
Billable Status
Yes — Valid for Submission
Code Describes
Other chorea
Short Description
Other chorea
Same as the full description in the CMS dataset.
Parent Code
G25
Other extrapyramidal and movement disorders

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG20-G26Extrapyramidal and movement disorders
CategoryG25Other extrapyramidal and movement disorders
This CodeG25.5Other chorea

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Ballism
  • Benign hereditary chorea
  • Brain lung thyroid syndrome
  • Cerebellar ataxia associated with another disorder
  • Childhood-onset benign chorea with striatal involvement
  • Chorea
  • Chorea co-occurrent and due to dentatorubropallidoluysian degeneration
  • Chorea co-occurrent and due to Huntington disease-like condition
  • Chorea co-occurrent and due to Wilson disease
  • Chorea due to and following encephalitis
  • Chorea due to and following infective disorder
  • Chorea due to and following injury of head
  • Chorea due to and following ventriculoperitoneal shunt
  • Chorea due to antiphospholipid syndrome
  • Chorea due to ataxia telangiectasia syndrome
  • Chorea due to cerebral anoxia
  • Chorea due to cerebral injury due to birth trauma
  • Chorea due to chronic hepatocerebral degeneration
  • Chorea due to classical pantothenate kinase associated neurodegeneration
  • Chorea due to endocrine disorder
  • Chorea due to hereditary ataxia
  • Chorea due to heredodegenerative disorder
  • Chorea due to Huntington disease-like 1
  • Chorea due to Huntington disease-like 2
  • Chorea due to Huntington disease-like 3
  • Chorea due to hyperglycemia
  • Chorea due to hyponatremia
  • Chorea due to hypoparathyroidism
  • Chorea due to immunoglobulin A vasculitis
  • Chorea due to immunological disorder
  • Chorea due to inborn error of metabolism
  • Chorea due to inherited aminoaciduria
  • Chorea due to inherited organic acidemia
  • Chorea due to injury of head
  • Chorea due to Lesch-Nyhan syndrome
  • Chorea due to metabolic disorder
  • Chorea due to mitochondrial cytopathy
  • Chorea due to neuroferritinopathy
  • Chorea due to paraneoplastic syndrome
  • Chorea due to polycythemia rubra vera
  • Chorea due to prion disease
  • Chorea due to systemic lupus erythematosus
  • Chorea due to thyrotoxicosis
  • Chorea due to widespread metastatic malignant neoplastic disease
  • Chorea following injury
  • Chorea gravidarum
  • Choreoathetosis
  • Chronic progressive non-hereditary chorea
  • Dentatorubropallidoluysian degeneration
  • Disorder of copper metabolism
  • Disorder of liver due to disorder of mineral metabolism
  • Dissociative neurological symptom disorder co-occurrent with chorea
  • Dubini's chorea
  • Early-onset neurodegeneration, choreoathetoid movement, microcytic anemia due to IREB2 mutation
  • Electric chorea
  • Hemiballism
  • Hemichorea
  • Hemichorea due to brain abscess
  • Hemichorea due to cerebral arteriovenous malformation
  • Hemichorea due to cerebral hemorrhage
  • Hemichorea due to cerebral infarction
  • Hemichorea due to head injury
  • Hemichorea due to multiple sclerosis
  • Hemichorea due to neoplasm of brain
  • Huntington disease-like syndrome
  • Infection causing chorea
  • Kinesiogenic choreoathetosis
  • Neurological disorder due to excess intake of micronutrients
  • Oral choreiform movement
  • Paroxysmal choreoathetosis
  • Paroxysmal dystonia
  • Paroxysmal dystonic choreoathetosis with episodic ataxia and spasticity
  • Paroxysmal kinesigenic dyskinesia
  • Post-hemiplegic chorea
  • Progressive chorea
  • Toxic chorea
  • Wilson's disease

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to G25.5: its own notes plus those printed at G25 and Chapter 6. A note printed at a category, block or chapter applies to every code under it.

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.

  • Chorea NOS

Excludes1

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

  • chorea NOS with heart involvement (I02.0)
  • Huntington's chorea (G10)
  • rheumatic chorea (I02.-)
  • Sydenham's chorea (I02.-)

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 G25 Other extrapyramidal and movement disorders applies to 16 codes
  • sleep related movement disorders (G47.6-)
From Chapter 6 (G00-G99) Diseases of the nervous system applies to 700 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

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

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name G25.5, its category, or a range that includes it.

Excludes1 3

These codes carry an Excludes1 note naming G25.5: they are not reported together with it, unless the two conditions are unrelated.

  • I02 Rheumatic chorea
    chorea NOS (G25.5)
  • R25.1 Tremor, unspecified
    chorea NOS (G25.5)
  • R25 Abnormal involuntary movements
    specific movement disorders (G20-G26) names G20-G26, which includes this code

Excludes2 1

These codes carry an Excludes2 note naming G25.5: its condition is not part of those codes, and both may be reported when the patient has both.

  • F98.4 Stereotyped movement disorders
    movement disorders of organic origin (G20-G25) names G20-G25, 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 NVS006
Other nervous system disorders (often hereditary or degenerative)
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Chorea

    involuntary, forcible, rapid, jerky movements that may be subtle or become confluent, markedly altering normal patterns of movement. hypotonia and pendular reflexes are often associated. conditions which feature recurrent or persistent episodes of chorea as a primary manifestation of disease are referred to as choreatic disorders. chorea is also a frequent manifestation of basal ganglia diseases.

Patient EducationClinical

Movement Disorders

Movement disorders are neurologic conditions that cause problems with movement, such as:

Read the full article at MedlinePlus

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

Convert G25.5 to ICD-9-CMHistory

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

ICD-9-CM
333.5 Chorea NEC
Approximate The match is approximate rather than exact.

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 G25.5Overview

What is the ICD-10 code for other chorea?

The ICD-10-CM code for other chorea is G25.5 (sometimes written as G255). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is G25.5 (Other extrapyramidal and movement disorders) a billable code?

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

What MS-DRG does G25.5 group to?

When other chorea is the principal diagnosis on an inpatient stay, it groups to MS-DRG 57, 56, with relative weights from 1.2835 to 2.2649 depending on complications. Higher weights mean higher Medicare reimbursement.

Can G25.5 be reported with I02.0?

Not as a rule. The Excludes1 note on G25.5 lists "chorea NOS with heart involvement (I02.0)". 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 G25.5?

Under the General Equivalence Mappings, other chorea converts to ICD-9-CM 333.5 (chorea NEC). The mapping is approximate, so confirm the match fits the documentation.