Chapter VI
Diseases of the nervous system
(G00-G99)
Extrapyramidal and movement disorders
(G20-G26)
G20 | Parkinson's disease Latin: Morbus Parkinson | |||||||
Hemiparkinsonism Paralysis agitans Parkinsonism or Parkinson's disease: · NOS · idiopathic · primary |
G21 | Secondary parkinsonism Latin: Parkinsonismus secundarius | |||||||
G21.0 | Malignant neuroleptic syndrome | |||||||
Use additional external cause code (Chapter XX), if desired, to identify drug. | ||||||||
G21.1 | Other drug-induced secondary parkinsonism | |||||||
Use additional external cause code (Chapter XX), if desired, to identify drug. | ||||||||
G21.2 | Secondary parkinsonism due to other external agents | |||||||
Use additional external cause code (Chapter XX), if desired, to identify external agent. | ||||||||
G21.3 | Postencephalitic parkinsonism | |||||||
G21.8 | Other secondary parkinsonism | |||||||
G21.9 | Secondary parkinsonism, unspecified |
G22* | Parkinsonism in diseases classified elsewhere Latin: Parkinsonismus in morbis aliis | |||||||
Syphilitic parkinsonism (A52.1+) |
G23 | Other degenerative diseases of basal ganglia Latin: Degenerationes gangliorum basalium aliae | |||||||
Excludes: | multi-system degeneration (G90.3) | |||||||
G23.0 | Hallervorden-Spatz disease | |||||||
Pigmentary pallidal degeneration | ||||||||
G23.1 | Progressive supranuclear ophthalmoplegia [Steele-Richardson-Olszewski] | |||||||
G23.2 | Striatonigral degeneration | |||||||
G23.8 | Other specified degenerative diseases of basal ganglia | |||||||
Calcification of basal ganglia | ||||||||
G23.9 | Degenerative disease of basal ganglia, unspecified |
G24 | Dystonia Latin: Dystonia | |||||||
Includes: | dyskinesia | |||||||
Excludes: | athetoid cerebral palsy (G80.3) | |||||||
G24.0 | Drug-induced dystonia Latin: Dystonia medicamentosa | |||||||
Use additional external cause code (Chapter XX), if desired, to identify drug. | ||||||||
G24.1 | Idiopathic familial dystonia Latin: Dystonia idiopathica familiaris | |||||||
Idiopathic dystonia NOS | ||||||||
G24.2 | Idiopathic nonfamilial dystonia Latin: Dystonia idiopathica non familiaris | |||||||
G24.3 | Spasmodic torticollis Latin: Torticollis spasmodica | |||||||
Excludes: | torticollis NOS (M43.6) | |||||||
G24.4 | Idiopathic orofacial dystonia Latin: Dystonia orofacialis idiopathica | |||||||
Orofacial dyskinesia | ||||||||
G24.5 | Blepharospasm Latin: Blepharospasmus | |||||||
G24.8 | Other dystonia Latin: Dystonia alia | |||||||
G24.9 | Dystonia, unspecified Latin: Dystonia, non specificata | |||||||
Dyskinesia NOS |
G25 | Other extrapyramidal and movement disorders Latin: Affectiones extrapyramidales et disordines motionum alii | |||||||
G25.0 | Essential tremor Latin: Tremor essentiallis | |||||||
Familial tremor | ||||||||
Excludes: | tremor NOS (R25.1) | |||||||
G25.1 | Drug-induced tremor Latin: Tremor medicamentosus | |||||||
Use additional external cause code (Chapter XX), if desired, to identify drug. | ||||||||
G25.2 | Other specified forms of tremor Latin: Formae tremoris specifici ailae | |||||||
Intention tremor | ||||||||
G25.3 | Myoclonus Latin: Myoclonus | |||||||
Drug-induced myoclonus | ||||||||
Use additional external cause code (Chapter XX), if desired, to identify drug, if drug-induced. | ||||||||
Excludes: | facial myokymia (G51.4) myoclonic epilepsy (G40.-) | |||||||
G25.4 | Drug-induced chorea Latin: Chorea medicamentosa | |||||||
Use additional external cause code (Chapter XX), if desired, to identify drug. | ||||||||
G25.5 | Other chorea Latin: Chorea alia | |||||||
Chorea NOS | ||||||||
Excludes: | chorea NOS with heart involvement (I02.0) Huntington's chorea (G10) rheumatic chorea (I02.-) Sydenham's chorea (I02.-) | |||||||
G25.6 | Drug-induced tics and other tics of organic origin Latin: Tics medicamentosi et organici | |||||||
Use additional external cause code (Chapter XX), if desired, to identify drug, if drug-induced. | ||||||||
Excludes: | de la Tourette's syndrome (F95.2) tic NOS (F95.9) | |||||||
G25.8 | Other specified extrapyramidal and movement disorders Latin: Affectiones extrapyramidales et disordines motionum specificatae aliae | |||||||
Restless legs syndrome Stiff-man syndrome | ||||||||
G25.9 | Extrapyramidal and movement disorder, unspecified Latin: Affectio extrapyramidalis et disordo motionum, non specificatus |
G26* | Extrapyramidal and movement disorders in diseases classified elsewhere Latin: Affectiones extrapyramidales et disordines motionum in morbis aliis |
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