G00–G99
Diseases of the Nervous System
Parkinson's, epilepsy, migraine, neuropathy
G23.8
Other specified degenerative diseases of basal ganglia
Billable
G23.9
Degenerative disease of basal ganglia, unspecified
Billable
G24
Dystonia
Non-billable
G24.0
Drug induced dystonia
Non-billable
G24.01
Drug induced subacute dyskinesia
Billable
G24.02
Drug induced acute dystonia
Billable
G24.09
Other drug induced dystonia
Billable
G24.1
Genetic torsion dystonia
Billable
G24.2
Idiopathic nonfamilial dystonia
Billable
G24.3
Spasmodic torticollis
Billable
G24.4
Idiopathic orofacial dystonia
Billable
G24.5
Blepharospasm
Billable
G24.8
Other dystonia
Billable
G24.9
Dystonia, unspecified
Billable
G25
Other extrapyramidal and movement disorders
Non-billable
G25.0
Essential tremor
Billable
G25.1
Drug-induced tremor
Billable
G25.2
Other specified forms of tremor
Billable
G25.3
Myoclonus
Billable
G25.4
Drug-induced chorea
Billable
G25.5
Other chorea
Billable
G25.6
Drug induced tics and other tics of organic origin
Non-billable
G25.61
Drug induced tics
Billable
G25.69
Other tics of organic origin
Billable
G25.7
Other and unspecified drug induced movement disorders
Non-billable
G25.70
Drug induced movement disorder, unspecified
Billable
G25.71
Drug induced akathisia
Billable
G25.79
Other drug induced movement disorders
Billable
G25.8
Other specified extrapyramidal and movement disorders
Non-billable
G25.81
Restless legs syndrome
Billable
G25.82
Stiff-man syndrome
Billable
G25.83
Benign shuddering attacks
Billable
G25.89
Other specified extrapyramidal and movement disorders
Billable
G25.9
Extrapyramidal and movement disorder, unspecified
Billable
G26
Extrapyramidal and movement disorders in diseases classified elsewhere
Billable
G30
Alzheimer's disease
Non-billable
G30.0
Alzheimer's disease with early onset
Billable
G30.1
Alzheimer's disease with late onset
Billable
G30.8
Other Alzheimer's disease
Billable
G30.9
Alzheimer's disease, unspecified
Billable
G31
Other degenerative diseases of nervous system, not elsewhere classified
Non-billable
G31.0
Frontotemporal dementia
Non-billable
G31.01
Pick's disease
Billable
G31.09
Other frontotemporal neurocognitive disorder
Billable
G31.1
Senile degeneration of brain, not elsewhere classified
Billable
G31.2
Degeneration of nervous system due to alcohol
Billable
G31.8
Other specified degenerative diseases of nervous system
Non-billable
G31.80
Leukodystrophy, unspecified
Billable
G31.81
Alpers disease
Billable
G31.82
Leigh's disease
Billable
Search all 98,186 codes instantly
Search ICDwise →