| G20 | Parkinson's disease |
| 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 |
| G23.8 | 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 |