Chapter 6
Range: G00-G99
FY2027 Dataset
ICD-10-CM Chapter 6: Diseases of the nervous system (G00-G99)
Central and peripheral nervous system conditions, headaches, and neuropathies.
Key Diagnosis Codes in Chapter 6
Verified against active FY2027 CDC NCHS code tables.
Showing active FY2027 codes
| Code | Official Descriptor | Status | Action |
|---|---|---|---|
| G00.0 |
Hemophilus meningitis
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| G00.1 |
Pneumococcal meningitis
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| G00.2 |
Streptococcal meningitis
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| G00.3 |
Staphylococcal meningitis
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| G00.8 |
Other bacterial meningitis
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| G00.9 |
Bacterial meningitis, unspecified
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| G01 |
Meningitis in bacterial diseases classified elsewhere
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| G02 |
Meningitis in oth infec/parastc diseases classd elswhr
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| G03.0 |
Nonpyogenic meningitis
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| G03.1 |
Chronic meningitis
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| G03.2 |
Benign recurrent meningitis [Mollaret]
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| G03.8 |
Meningitis due to other specified causes
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| G03.9 |
Meningitis, unspecified
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| G04.00 |
Acute disseminated encephalitis and encephalomyelitis, unsp
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| G04.01 |
Postinfect acute dissem encephalitis and encephalomyelitis
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| G04.02 |
Postimmun ac dissem encphlts, myelitis and encephalomyelitis
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| G04.1 |
Tropical spastic paraplegia
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| G04.2 |
Bacterial meningoencephalitis and meningomyelitis, NEC
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| G04.30 |
Acute necrotizing hemorrhagic encephalopathy, unspecified
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| G04.31 |
Postinfectious acute necrotizing hemorrhagic encephalopathy
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| G04.32 |
Postimmun acute necrotizing hemorrhagic encephalopathy
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| G04.39 |
Other acute necrotizing hemorrhagic encephalopathy
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| G04.81 |
Other encephalitis and encephalomyelitis
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| G04.82 |
Acute flaccid myelitis
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| G04.89 |
Other myelitis
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| G04.90 |
Encephalitis and encephalomyelitis, unspecified
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| G04.91 |
Myelitis, unspecified
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| G05.3 |
Encephalitis and encephalomyelitis in diseases classd elswhr
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| G05.4 |
Myelitis in diseases classified elsewhere
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| G06.0 |
Intracranial abscess and granuloma
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| G06.1 |
Intraspinal abscess and granuloma
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| G06.2 |
Extradural and subdural abscess, unspecified
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| G07 |
Intcrn & intraspinal abscs & granuloma in dis classd elswhr
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| G08 |
Intracranial and intraspinal phlebitis and thrombophlebitis
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| G09 |
Sequelae of inflammatory diseases of central nervous system
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| G10 |
Huntington's disease
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| G11.0 |
Congenital nonprogressive ataxia
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| G11.10 |
Early-onset cerebellar ataxia, unspecified
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| G11.11 |
Friedreich ataxia
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| G11.19 |
Other early-onset cerebellar ataxia
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| G11.2 |
Late-onset cerebellar ataxia
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| G11.3 |
Cerebellar ataxia with defective DNA repair
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| G11.4 |
Hereditary spastic paraplegia
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| G11.5 |
Hypomyelination - hypogonadotropic hypogonadism - hypodontia
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| G11.6 |
Leukodystrophy with vanishing white matter disease
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| G11.8 |
Other hereditary ataxias
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| G11.9 |
Hereditary ataxia, unspecified
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| G12.0 |
Infantile spinal muscular atrophy, type I [Werdnig-Hoffman]
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| G12.1 |
Other inherited spinal muscular atrophy
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| G12.20 |
Motor neuron disease, unspecified
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| G12.21 |
Amyotrophic lateral sclerosis
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| G12.22 |
Progressive bulbar palsy
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| G12.23 |
Primary lateral sclerosis
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| G12.24 |
Familial motor neuron disease
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| G12.25 |
Progressive spinal muscle atrophy
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| G12.29 |
Other motor neuron disease
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|
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| G12.8 |
Other spinal muscular atrophies and related syndromes
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| G12.9 |
Spinal muscular atrophy, unspecified
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| G13.0 |
Paraneoplastic neuromyopathy and neuropathy
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| G13.1 |
Oth systemic atrophy aff cnsl in neoplastic disease
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| G13.2 |
Systemic atrophy primarily affecting the cnsl in myxedema
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| G13.8 |
Systemic atrophy aff cnsl in oth diseases classd elswhr
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| G14 |
Postpolio syndrome
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| G20.A1 |
Parkinson's dis w/o dyskinesia, w/o mention of fluctuations
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| G20.A2 |
Parkinson's disease without dyskinesia, with fluctuations
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| G20.B1 |
Parkinson's dis with dyskinesia, w/o mention of fluctuations
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| G20.B2 |
Parkinson's disease with dyskinesia, with fluctuations
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| G20.C |
Parkinsonism, unspecified
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| G21.0 |
Malignant neuroleptic syndrome
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| G21.11 |
Neuroleptic induced parkinsonism
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| G21.19 |
Other drug induced secondary parkinsonism
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| G21.2 |
Secondary parkinsonism due to other external agents
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| G21.3 |
Postencephalitic parkinsonism
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| G21.4 |
Vascular parkinsonism
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| G21.8 |
Other secondary parkinsonism
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| G21.9 |
Secondary parkinsonism, unspecified
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| G23.0 |
Hallervorden-Spatz disease
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| G23.1 |
Progressive supranuclear ophthalmoplegia
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| G23.2 |
Striatonigral degeneration
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| G23.3 |
Hypomyelination with atrophy of basal ganglia and cerebellum
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| G23.8 |
Other specified degenerative diseases of basal ganglia
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| G23.9 |
Degenerative disease of basal ganglia, unspecified
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| G24.01 |
Drug induced subacute dyskinesia
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| G24.02 |
Drug induced acute dystonia
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| G24.09 |
Other drug induced dystonia
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| G24.1 |
Genetic torsion dystonia
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| G24.2 |
Idiopathic nonfamilial dystonia
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| G24.3 |
Spasmodic torticollis
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| G24.4 |
Idiopathic orofacial dystonia
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| G24.5 |
Blepharospasm
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| G24.8 |
Other dystonia
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| G24.9 |
Dystonia, unspecified
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| G25.0 |
Essential tremor
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| G25.1 |
Drug-induced tremor
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| G25.2 |
Other specified forms of tremor
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| G25.3 |
Myoclonus
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| G25.4 |
Drug-induced chorea
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| G25.5 |
Other chorea
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| G25.61 |
Drug induced tics
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| G25.69 |
Other tics of organic origin
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|
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Chapter Guidelines
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