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ataxia (in):
- hypothyroidism (E03.-)
- myxedematous congenital iodine deficiency (E00.1)
G14 Postpolio syndrome
- Postpolio myelitic syndrome
- Excludes1: sequelae of poliomyelitis (B91)
Extrapyramidal and movement disorders (G20-G26)
G20 Parkinson's disease
- Includes hemiparkinsonism
- idiopathic Parkinsonism or Parkinson's disease
- paralysis agitans
- Parkinsonism or Parkinson's disease NOS
- primary Parkinsonism or Parkinson's disease
- Excludes1: dementia with Parkinsonism (G31.83)
G21 Secondary parkinsonism
- Excludes1: dementia with Parkinsonism (G31.83)
- Huntington's disease (G10)
- Shy-Drager syndrome (G90.3)
- syphilitic Parkinsonism (A52.19)
- G21.0 Malignant neuroleptic syndrome
- Code first (T43.3-T43.5) to identify drug
- Excludes1: neuroleptic induced parkinsonism (G21.11)
- G21.1 Other drug-induced secondary parkinsonism
- G21.11 Neuroleptic induced parkinsonism
- Code first (T43.3-T43.5) to identify drug
- Excludes1: malignant neuroleptic syndrome (G21.0)
- G21.19 Other drug induced secondary parkinsonism
- Code first (T36-T50) to identify drug
- G21.11 Neuroleptic induced parkinsonism
- G21.2 Secondary parkinsonism due to other external agents
- Code first (T51-T65) to identify external agent
- 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
- Excludes2: multi-system degeneration of the autonomic nervous system (G90.3)
- G23.0 Hallervorden-Spatz disease
- Pigmentary pallidal degeneration
- G23.1 Progressive supranuclear ophthalmoplegia [Steele-Richardson-Olszewski]
- G23.2 Striatonigral degeneration
- G23.
