G20
Parkinson's disease
Extrapyramidal and movement disorders (G20-G26)
Chapter 6: Diseases of the nervous system (G00-G99)
58 codes in this range
G20.A
Parkinson's disease without dyskinesia
G20.A1
Parkinson's disease without dyskinesia, without mention of fluctuations
G20.A2
Parkinson's disease without dyskinesia, with fluctuations
G20.B
Parkinson's disease with dyskinesia
G20.B1
Parkinson's disease with dyskinesia, without mention of fluctuations
G20.B2
Parkinson's disease with dyskinesia, with fluctuations
G20.C
Parkinsonism, unspecified
G21
Secondary parkinsonism
G21.0
Malignant neuroleptic syndrome
G21.1
Other drug-induced secondary parkinsonism
G21.11
Neuroleptic induced parkinsonism
G21.19
Other drug induced secondary parkinsonism
G21.2
Secondary parkinsonism due to other external agents
G21.3
Postencephalitic parkinsonism
G21.4
Vascular parkinsonism
G21.8
Other secondary parkinsonism
G21.9
Secondary parkinsonism, unspecified
G23
Other degenerative diseases of basal ganglia
G23.0
Hallervorden-Spatz disease
G23.1
Progressive supranuclear ophthalmoplegia [Steele-Richardson-Olszewski]
G23.2
Striatonigral degeneration
G23.3
Hypomyelination with atrophy of the basal ganglia and cerebellum
G23.8
Other specified degenerative diseases of basal ganglia
G23.9
Degenerative disease of basal ganglia, unspecified
G24
Dystonia
G24.0
Drug induced dystonia
G24.01
Drug induced subacute dyskinesia
G24.02
Drug induced acute dystonia
G24.09
Other drug induced dystonia
G24.1
Genetic torsion dystonia
G24.2
Idiopathic nonfamilial dystonia
G24.3
Spasmodic torticollis
G24.4
Idiopathic orofacial dystonia
G24.5
Blepharospasm
G24.8
Other dystonia
G24.9
Dystonia, unspecified
G25
Other extrapyramidal and movement disorders
G25.0
Essential tremor
G25.1
Drug-induced tremor
G25.2
Other specified forms of tremor
G25.3
Myoclonus
G25.4
Drug-induced chorea
G25.5
Other chorea
G25.6
Drug induced tics and other tics of organic origin
G25.61
Drug induced tics
G25.69
Other tics of organic origin
G25.7
Other and unspecified drug induced movement disorders
G25.70
Drug induced movement disorder, unspecified
G25.71
Drug induced akathisia
G25.79
Other drug induced movement disorders
G25.8
Other specified extrapyramidal and movement disorders
G25.81
Restless legs syndrome
G25.82
Stiff-man syndrome
G25.83
Benign shuddering attacks
G25.89
Other specified extrapyramidal and movement disorders
G25.9
Extrapyramidal and movement disorder, unspecified
G26
Extrapyramidal and movement disorders in diseases classified elsewhere