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)

• (320) Bacterial meningitis
  • (320.0) Meningitis, hemophilus
  • (320.9) Meningitis, bacterial, NOS
• (322) Meningitis of unspecified cause
  • (322.9) Meningitis, unspec. cause
• (323) Encephalitis, myelitis, and encephalomyelitis
  • (323.9) Encephalitis, unspec.
• (324) Intracranial and intraspinal abscess
• (325) Phlebitis and thrombophlebitis of intracranial venous sinuses
  • (325.0) Venous sinus thrombosis, intracranial
• (326) Late effects of intracranial abscess or pyogenic infection

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

• (330) Cerebral degenerations usually manifest in childhood
  • (330.0) Leukodystrophy
    • Krabbe disease
    • Pelizaeus-Merzbacher disease
  • (330.1) Cerebral lipidoses
    • Tay-Sachs disease
• (331) Other cerebral degenerations
  • (331.0) Alzheimer's
  • (331.1) Pick's disease
  • (331.4) Hydrocephalus, obstructive
  • (331.8) Other cerebral degeneration
    • (331.81) Reye's syndrome
• (332) Parkinson's disease
  • (332.0) Parkinsonism, primary
• (333) Other extrapyramidal disease and abnormal movement disorders
  • (333.0) Other degenerative diseases of the basal ganglia
    • Olivopontocerebellar atrophy
    • Shy-Drager syndrome
  • (333.1) Essential tremor/familial tremor
  • (333.2) Myoclonus
    • Lafora's disease
    • Unverricht disease
  • (333.4) Huntington's chorea
  • (333.8) Fragments of torsion dystonia
    • (333.81) Blepharospasm
  • (333.9) Other and unspecified extrapyramidal diseases and abnormal movement disorders
    • (333.99) Other extrapyramidal diseases and abnormal movement disorders
      • Restless legs
      • Serotonin syndrome

• (334) Spinocerebellar disease
  • (334.0) Friedreich's ataxia
    • Spinocerebellar ataxia
  • (334.1) Hereditary spastic paraplegia
  • (334.2) Primary cerebellar degeneration
  • (334.3) Other cerebellar ataxia
  • (334.4) Cerebellar ataxia in diseases classified elsewhere
  • (334.8) Other spinocerebellar diseases
    • Ataxia-telangiectasia [Louis-Bar syndrome]
    • Corticostriatal-spinal degeneration
  • (334.9) Spinocerebellar disease unspecified

• (335) Anterior horn cell disease
  • (335.2) Motor neuron disease
    • (335.20) Amyotrophic lateral sclerosis
    • (335.21) Progressive muscular atrophy
    • (335.22) Progressive bulbar palsy
    • (335.23) Pseudobulbar palsy
    • (335.24) Primary lateral sclerosis
    • (335.29) Other motor neuron diseases

• (336) Other diseases of spinal cord
  • (336.0) Syringomyelia and syringobulbia

• (337) Disorders of the autonomic nervous system
  • (337.2) Reflex sympathetic dystrophy

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

• (340) Multiple sclerosis
• (341) Other demyelinating diseases of central nervous system
• (342) Hemiplegia
  • (342.0) Hemiplegia, flaccid
  • (342.1) Hemiplegia, spastic
• (343) Infantile cerebral palsy
  • (343.0) Cerebral palsy, paraplegic, congenital
  • (343.1) Cerebral palsy, hemiplegic, congenital
  • (343.2) Cerebral palsy, quadriplegic
• (344) Other paralytic syndromes
  • (344.0) Quadraplegia and quadraparesis
  • (344.1) Paraplegia
  • (344.2) Diplegia of upper limbs
  • (344.3) Monoplegia of lower limb
  • (344.4) Monoplegia of upper limb
  • (344.5) Unspecified monoplegia
  • (344.6) Cauda equina syndrome
  • (344.8) Other specified paralytic syndromes
    • (344.81) Locked-in state
  • (344.9) Paralysis unspecified

• (345) Epilepsy
  • (345.0) Epilepsy, absence, w/o intractable epilepsy
  • (345.1) Epilepsy, tonic-clonic, w/o status
  • (345.3) Epilepsy, status
  • (345.4) Epilepsy, temporal lobe, w/o status
  • (345.9) Epilepsy, unspec., w/o status
• (346) Migraine
  • (346.0) Migraine, classical, not intractable
  • (346.1) Migraine, common, not intractable
  • (346.2) Headaches, cluster, not intractable
  • (346.9) Migraine, unspec., not intractable
• (347) Cataplexy and narcolepsy
  • (347.0) Narcolepsy, w/o cataplexy
• (348) Other conditions of brain
  • (348.2) Pseudotumor cerebri
  • (348.3) Encephalopathy, unspec.
    • (348.31) Encephalopathy, metabolic
  • (348.5) Cerebral edema
• (349) Other and unspecified disorders of the nervous system
  • (349.0) Headache, post spinal puncture

disorders of the peripheral nervous system (350-359)

• (350) Trigeminal nerve disorders
  • (350.1) Trigeminal neuralgia
• (351) Facial nerve disorders
  • (351.0) Bell's palsy
• (352) Disorders of other cranial nerves
• (353) Nerve root and plexus disorders
  • (353.0) Thoracic outlet syndrome
  • (353.6) Phantom limb
• (354) Mononeuritis of upper limb and mononeuritis multiplex
  • (354.0) Carpal tunnel
• (355) Mononeuritis of lower limb
  • (355.1) Lateral femoral cutaneous neuropathy
  • (355.6) Morton's neuroma
• (356) Hereditary and idiopathic peripheral neuropathy
• (357) Inflammatory and toxic neuropathy
  • (357.0) Guillain-Barré syndrome
  • (357.5) Neuropathy, poly-, alcoholic
  • (357.9) Neuropathy, poly-, unspec.
• (358) Myoneural disorders
  • (358.0) Myasthenia gravis w/o exacerbation
    • (358.01) Myasthenia gravis w/ exacerbation
• (359) Muscular dystrophies and other myopathies
  • (359.0) Congenital hereditary myopathies, including:
    • Benign congenital myopathy
    • Central core disease
    • Centronuclear myopathy
    • Myotubular myopathy
    • Nemaline body disease
  • (359.1) Muscular dyst., hereditary

See also

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