List of ICD-9 codes 320-359: Diseases of the nervous system

6a. Diseases of the nervous system (320-359)

inflammatory diseases of the central nervous system (320-326)

• Bacterial meningitis
• Meningitis, hemophilus
• Meningitis, bacterial, NOS
• Meningitis of unspecified cause
• Meningitis, unspec. cause
• Encephalitis, myelitis, and encephalomyelitis
• Encephalitis, unspec.
• Intracranial and intraspinal abscess
• Phlebitis and thrombophlebitis of intracranial venous sinuses
• Venous sinus thrombosis, intracranial
• Late effects of intracranial abscess or pyogenic infection

hereditary and degenerative diseases of the central nervous system (330-337)

• Cerebral degenerations usually manifest in childhood
• Leukodystrophy
• Krabbe disease
• Pelizaeus-Merzbacher disease
• Cerebral lipidoses
• Tay-Sachs disease
• Other cerebral degenerations
• Alzheimer's
• Pick's disease
• Hydrocephalus, obstructive
• Other cerebral degeneration
• Reye's syndrome
• Parkinson's disease
• Parkinsonism, primary
• Other extrapyramidal disease and abnormal movement disorders
• Other degenerative diseases of the basal ganglia
• Olivopontocerebellar atrophy
• Shy-Drager syndrome
• Essential tremor/familial tremor
• Myoclonus
• Lafora's disease
• Unverricht disease
• Huntington's chorea
• Fragments of torsion dystonia
• Blepharospasm
• Other and unspecified extrapyramidal diseases and abnormal movement disorders
• Other extrapyramidal diseases and abnormal movement disorders
• Restless legs
• Serotonin syndrome

• Spinocerebellar disease
• Friedreich's ataxia
• Spinocerebellar ataxia
• Hereditary spastic paraplegia
• Primary cerebellar degeneration
• Other cerebellar ataxia
• Cerebellar ataxia in diseases classified elsewhere
• Other spinocerebellar diseases
• Ataxia-telangiectasia [Louis-Bar syndrome]
• Corticostriatal-spinal degeneration
• Spinocerebellar disease unspecified

• Anterior horn cell disease
• Motor neuron disease
• Amyotrophic lateral sclerosis
• Progressive muscular atrophy
• Progressive bulbar palsy
• Pseudobulbar palsy
• Primary lateral sclerosis
• Other motor neuron diseases

• Other diseases of spinal cord
• Syringomyelia and syringobulbia

• Disorders of the autonomic nervous system
• Reflex sympathetic dystrophy

other disorders of the central nervous system (340-349)

• Multiple sclerosis
• Other demyelinating diseases of central nervous system
• Hemiplegia
• Hemiplegia, flaccid
• Hemiplegia, spastic
• Infantile cerebral palsy
• Cerebral palsy, paraplegic, congenital
• Cerebral palsy, hemiplegic, congenital
• Cerebral palsy, quadriplegic
• Other paralytic syndromes
• Quadraplegia and quadraparesis
• Paraplegia
• Diplegia of upper limbs
• Monoplegia of lower limb
• Monoplegia of upper limb
• Unspecified monoplegia
• Cauda equina syndrome
• Other specified paralytic syndromes
• Locked-in state
• Paralysis unspecified

• Epilepsy
• Epilepsy, absence, w/o intractable epilepsy
• Epilepsy, tonic-clonic, w/o status
• Epilepsy, status
• Epilepsy, temporal lobe, w/o status
• Epilepsy, unspec., w/o status
• Migraine
• Migraine, classical, not intractable
• Migraine, common, not intractable
• Headaches, cluster, not intractable
• Migraine, unspec., not intractable
• Cataplexy and narcolepsy
• Narcolepsy, w/o cataplexy
• Other conditions of brain
• Pseudotumor cerebri
• Encephalopathy, unspec.
• Encephalopathy, metabolic
• Cerebral edema
• Other and unspecified disorders of the nervous system
• Headache, post spinal puncture

disorders of the peripheral nervous system (350-359)

• Trigeminal nerve disorders
• Trigeminal neuralgia
• Facial nerve disorders
• Bell's palsy
• Disorders of other cranial nerves
• Nerve root and plexus disorders
• Thoracic outlet syndrome
• Phantom limb
• Mononeuritis of upper limb and mononeuritis multiplex
• Carpal tunnel
• Mononeuritis of lower limb
• Lateral femoral cutaneous neuropathy
• Morton's neuroma
• Hereditary and idiopathic peripheral neuropathy
• Inflammatory and toxic neuropathy
• Guillain-Barré syndrome
• Neuropathy, poly-, alcoholic
• Neuropathy, poly-, unspec.
• Myoneural disorders
• Myasthenia gravis w/o exacerbation
• Myasthenia gravis w/ exacerbation
• Muscular dystrophies and other myopathies
• Congenital hereditary myopathies, including:
• Benign congenital myopathy
• Central core disease
• Centronuclear myopathy
• Myotubular myopathy
• Nemaline body disease
• Muscular dyst., hereditary

See also

• List of ICD-9 codes
• ICD-10 Chapter G: Diseases of the nervous system