Extrapyramidal and movement disorders (G20-G26)
G20Parkinson's disease
› Hemiparkinsonism
› Idiopathic Parkinsonism or Parkinson's disease
› Paralysis agitans
› Primary Parkinsonism or Parkinson's disease
Use Additional Code: code, if applicable, to identify:
› dementia with anxiety (F02.84, F02.A4, F02.B4, F02.C4)
› dementia with behavioral disturbance (F02.81-, F02.A1-, F02.B1-, F02.C1-)
› dementia with mood disturbance (F02.83, F02.A3, F02.B3, F02.C3)
› dementia with psychotic disturbance (F02.82, F02.A2, F02.B2, F02.C2)
› dementia without behavioral disturbance (F02.80, F02.A0, F02.B0, F02.C0)
› mild neurocognitive disorder due to known physiological condition (F06.7-)
G20.AParkinson's disease without dyskinesia
G20.A1Parkinson's disease without dyskinesia, without mention of fluctuations
› Parkinson's disease NOS
› Parkinson's disease without dyskinesia, without mention of OFF episodes
G20.A2Parkinson's disease without dyskinesia, with fluctuations
› Parkinson's disease without dyskinesia, with OFF episodes
G20.BParkinson's disease with dyskinesia
Excludes 1: drug induced dystonia (G24.0-)
G20.B1Parkinson's disease with dyskinesia, without mention of fluctuations
› Parkinson's disease with dyskinesia, without mention of OFF episodes
G20.B2Parkinson's disease with dyskinesia, with fluctuations
› Parkinson's disease with dyskinesia, with OFF episodes
G20.CParkinsonism, unspecified
› Parkinsonism, NOS
Excludes 1: Parkinson's disease NOS (G20.A1)
› Parkinson's disease with dyskinesia (G20.B-)
› Parkinson's disease without dyskinesia (G20.A-)
› secondary parkinsonism (G21.-)
G21Secondary parkinsonism
Excludes 1: dementia with Parkinsonism (G31.83)
› Huntington's disease (G10)
› Shy-Drager syndrome (G90.3)
› syphilitic Parkinsonism (A52.19)
G21.0Malignant neuroleptic syndrome
Use Additional Code: code for adverse effect, if applicable, to identify drug (T43.3X5, T43.4X5, T43.505, T43.595)
Excludes 1: neuroleptic induced parkinsonism (G21.11)
G21.1Other drug-induced secondary parkinsonism
G21.11Neuroleptic induced parkinsonism
Use Additional Code: code for adverse effect, if applicable, to identify drug (T43.3X5, T43.4X5, T43.505, T43.595)
Excludes 1: malignant neuroleptic syndrome (G21.0)
G21.19Other drug induced secondary parkinsonism
› Other medication-induced parkinsonism
Use Additional Code: code for adverse effect, if applicable, to identify drug (T36-T50) with fifth or sixth character 5)
G21.2Secondary parkinsonism due to other external agents
Code First: (T51-T65) to identify external agent
G21.3Postencephalitic parkinsonism
G21.4Vascular parkinsonism
G21.8Other secondary parkinsonism
G21.9Secondary parkinsonism, unspecified
G23Other degenerative diseases of basal ganglia
Excludes 2: multi-system degeneration of the autonomic nervous system (G90.3)
G23.0Hallervorden-Spatz disease
› Pigmentary pallidal degeneration
G23.1Progressive supranuclear ophthalmoplegia [Steele-Richardson-Olszewski]
› Progressive supranuclear palsy
G23.2Striatonigral degeneration
G23.3Hypomyelination with atrophy of the basal ganglia and cerebellum
› H-ABC
G23.8Other specified degenerative diseases of basal ganglia
› Calcification of basal ganglia
G23.9Degenerative disease of basal ganglia, unspecified
G24Dystonia
Includes: dyskinesia
Excludes 2: athetoid cerebral palsy (G80.3)
G24.0Drug induced dystonia
Use Additional Code: code for adverse effect, if applicable, to identify drug (T36-T50) with fifth or sixth character 5)
G24.01Drug induced subacute dyskinesia
› Drug induced blepharospasm
› Drug induced orofacial dyskinesia
› Neuroleptic induced tardive dyskinesia
› Tardive dyskinesia
G24.02Drug induced acute dystonia
› Acute dystonic reaction to drugs
› Neuroleptic induced acute dystonia
G24.09Other drug induced dystonia
G24.1Genetic torsion dystonia
› Dystonia deformans progressiva
› Dystonia musculorum deformans
› Familial torsion dystonia
› Idiopathic familial dystonia
› Idiopathic (torsion) dystonia NOS
› (Schwalbe-) Ziehen-Oppenheim disease
G24.2Idiopathic nonfamilial dystonia
G24.3Spasmodic torticollis
Excludes 1: congenital torticollis (Q68.0)
› hysterical torticollis (F44.4)
› ocular torticollis (R29.891)
› psychogenic torticollis (F45.8)
› torticollis NOS (M43.6)
› traumatic recurrent torticollis (S13.4)
G24.4Idiopathic orofacial dystonia
› Orofacial dyskinesia
Excludes 1: drug induced orofacial dyskinesia (G24.01)
G24.5Blepharospasm
Excludes 1: drug induced blepharospasm (G24.01)
G24.8Other dystonia
› Acquired torsion dystonia NOS
G24.9Dystonia, unspecified
› Dyskinesia NOS
G25Other extrapyramidal and movement disorders
Excludes 2: sleep related movement disorders (G47.6-)
G25.0Essential tremor
› Familial tremor
Excludes 1: tremor NOS (R25.1)
G25.1Drug-induced tremor
Use Additional Code: code for adverse effect, if applicable, to identify drug (T36-T50) with fifth or sixth character 5)
G25.2Other specified forms of tremor
› Intention tremor
G25.3Myoclonus
› Drug-induced myoclonus
› Palatal myoclonus
Use Additional Code: code for adverse effect, if applicable, to identify drug (T36-T50) with fifth or sixth character 5)
Excludes 1: facial myokymia (G51.4)
› myoclonic epilepsy (G40.-)
G25.4Drug-induced chorea
Use Additional Code: code for adverse effect, if applicable, to identify drug (T36-T50) with fifth or sixth character 5)
G25.5Other chorea
› Chorea NOS
Excludes 1: chorea NOS with heart involvement (I02.0)
› Huntington's chorea (G10)
› rheumatic chorea (I02.-)
› Sydenham's chorea (I02.-)
G25.6Drug induced tics and other tics of organic origin
G25.61Drug induced tics
Use Additional Code: code for adverse effect, if applicable, to identify drug (T36-T50) with fifth or sixth character 5)
G25.69Other tics of organic origin
Excludes 1: habit spasm (F95.9)
› tic NOS (F95.9)
› Tourette's syndrome (F95.2)
G25.7Other and unspecified drug induced movement disorders
Use Additional Code: code for adverse effect, if applicable, to identify drug (T36-T50) with fifth or sixth character 5)
G25.70Drug induced movement disorder, unspecified
G25.71Drug induced akathisia
› Drug induced acathisia
› Neuroleptic induced acute akathisia
› Tardive akathisia
G25.79Other drug induced movement disorders
G25.8Other specified extrapyramidal and movement disorders
G25.81Restless legs syndrome
G25.82Stiff-man syndrome
G25.83Benign shuddering attacks
G25.89Other specified extrapyramidal and movement disorders
G25.9Extrapyramidal and movement disorder, unspecified
G26Extrapyramidal and movement disorders in diseases classified elsewhere
Code First: underlying disease