International Statistical Classification of Diseases and Related Health Problems 10th Revision (ICD-10)-WHO Version for ;2019-covid-expanded

Chapter VI
Diseases of the nervous system
(G00-G99)

Extrapyramidal and movement disorders
(G20-G26)

G20 Parkinson disease

Incl.:

Hemiparkinsonism

Paralysis agitans

Parkinsonism or Parkinson disease:

NOS
idiopathic
primary

G21 Secondary parkinsonism

G21.0 Malignant neuroleptic syndrome

Coding-Hint: Use additional external cause code (Chapter XX), if desired, to identify drug.

G21.1 Other drug-induced secondary parkinsonism

Coding-Hint: Use additional external cause code (Chapter XX), if desired, to identify drug.

G21.2 Secondary parkinsonism due to other external agents

Coding-Hint: Use additional external cause code (Chapter XX), if desired, to identify external agent.

G21.3 Postencephalitic parkinsonism

G21.4 Vascular parkinsonism

G21.8 Other secondary parkinsonism

G21.9 Secondary parkinsonism, unspecified

G22* Parkinsonism in diseases classified elsewhere

Incl.:: Syphilitic parkinsonism (A52.1†)

G23 Other degenerative diseases of basal ganglia

G23.0 Hallervorden-Spatz disease

Incl.:: Pigmentary pallidal degeneration

G23.1 Progressive supranuclear ophthalmoplegia [Steele-Richardson-Olszewski]

Incl.:: Progressive supranuclear palsy

G23.2 Multiple system atrophy, parkinsonian type [MSA-P]

G23.3 Multiple system atrophy, cerebellar type [MSA-C]

G23.8 Other specified degenerative diseases of basal ganglia

Incl.:: Calcification of basal ganglia; Neurogenic orthostatic hypotension [Shy-Drager]

Excl.:: orthostatic hypotension NOS (I95.1)

G23.9 Degenerative disease of basal ganglia, unspecified

G24 Dystonia

Incl.:: dyskinesia

Excl.:: athetoid cerebral palsy (G80.3)

G24.0 Drug-induced dystonia

Coding-Hint: Use additional external cause code (Chapter XX), if desired, to identify drug.

G24.1 Idiopathic familial dystonia

Incl.:: Idiopathic dystonia NOS

G24.2 Idiopathic nonfamilial dystonia

G24.3 Spasmodic torticollis

Excl.:: torticollis NOS (M43.6)

G24.4 Idiopathic orofacial dystonia

Incl.:: Orofacial dyskinesia

G24.5 Blepharospasm

G24.8 Other dystonia

G24.9 Dystonia, unspecified

Incl.:: Dyskinesia NOS

G25 Other extrapyramidal and movement disorders

G25.0 Essential tremor

Incl.:: Familial tremor

Excl.:: tremor NOS (R25.1)

G25.1 Drug-induced tremor

Coding-Hint: Use additional external cause code (Chapter XX), if desired, to identify drug.

G25.2 Other specified forms of tremor

Incl.:: Intention tremor

G25.3 Myoclonus

Incl.:: Drug-induced myoclonus

Coding-Hint: Use additional external cause code (Chapter XX), if desired, to identify drug, if drug-induced.

Excl.:: facial myokymia (G51.4); myoclonic epilepsy (G40.-)

G25.4 Drug-induced chorea

Coding-Hint: Use additional external cause code (Chapter XX), if desired, to identify drug.

G25.5 Other chorea

Incl.:: Chorea NOS

Excl.:: chorea NOS with heart involvement (I02.0); Huntington chorea (G10); rheumatic chorea (I02.-); Sydenham chorea (I02.-)

G25.6 Drug-induced tics and other tics of organic origin

Coding-Hint: Use additional external cause code (Chapter XX), if desired, to identify drug, if drug-induced.

Excl.:: de la Tourette syndrome (F95.2); tic NOS (F95.9)

G25.8 Other specified extrapyramidal and movement disorders

Incl.:: Akathisia (drug-induced) (treatment-induced); Restless legs syndrome; Stiff-person[man] syndrome

Coding-Hint: Use additional external cause code (Chapter XX), if desired, to identify drug, if drug-induced

G25.9 Extrapyramidal and movement disorder, unspecified

G26* Extrapyramidal and movement disorders in diseases classified elsewhere