# List of ICD-9 codes 320–389: diseases of the nervous system and sense organs

ICD-9 chapters :
| Chapter | Block | Title |
| I | 001–139 | Infectious and Parasitic Diseases |
| II | 140–239 | Neoplasms |
| III | 240–279 | Endocrine, Nutritional and Metabolic Diseases, and Immunity Disorders |
| IV | 280–289 | Diseases of the Blood and Blood-forming Organs |
| V | 290–319 | Mental Disorders |
| VI | 320–389 | Diseases of the Nervous System and Sense Organs |
| VII | 390–459 | Diseases of the Circulatory System |
| VIII | 460–519 | Diseases of the Respiratory System |
| IX | 520–579 | Diseases of the Digestive System |
| X | 580–629 | Diseases of the Genitourinary System |
| XI | 630–679 | Complications of Pregnancy, Childbirth, and the Puerperium |
| XII | 680–709 | Diseases of the Skin and Subcutaneous Tissue |
| XIII | 710–739 | Diseases of the Musculoskeletal System and Connective Tissue |
| XIV | 740–759 | Congenital Anomalies |
| XV | 760–779 | Certain Conditions originating in the Perinatal Period |
| XVI | 780–799 | Symptoms, Signs and Ill-defined Conditions |
| XVII | 800–999 | Injury and Poisoning |
| | E800–E999 | Supplementary Classification of External Causes of Injury and Poisoning |
| | V01–V82 | Supplementary Classification of Factors influencing Health Status and Contact with Health Services |
| | M8000–M9970 | Morphology of Neoplasms |
This is a shortened version of the sixth chapter of the ICD-9: Diseases of the Nervous System and Sense Organs. It covers ICD codes 320 to 389. The full chapter can be found on pages 215 to 258 of Volume 1, which contains all (sub)categories of the ICD-9. Volume 2 is an alphabetical index of Volume 1. Both volumes can be downloaded for free from the website of the World Health Organization.
In the ICD-9 system, a disease may have a cause listed in one chapter, and its manifestations listed in another. For example, Tuberculous meningitis is caused by a bacterial infection, and is therefore listed in Chapter 1, Infectious and parasitic diseases. However, as it results in a disorder of the nervous system, it is also listed in this chapter. An asterisk (*) means that a disease has an underlying cause which can be found elsewhere in the ICD. A code referring to such an underlying cause may be right next to the name, in parentheses, and marked with a dagger symbol of the Times New Roman font (†).

## Inflammatory diseases of the central nervous system (320–326)

* 320 Bacterial meningitis
** 320.0 Haemophilus meningitis
** 320.1 Pneumococcal meningitis
** 320.2 Streptococcal meningitis
** 320.3 Staphylococcal meningitis
** 320.4* Tuberculous meningitis (013.0†)
** 320.5* Meningococcal meningitis (036.0†)
** 320.7* Meningitis in other bacterial diseases classified elsewhere
** 320.8 Meningitis due to other specified bacteria
** 320.9 Meningitis due to unspecified bacterium
* 321* Meningitis due to other organisms
** 321.0* Fungal meningitis (110–118†)
** 321.1* Meningitis due to Coxsackie virus (047.0†)
** 321.2* Meningitis due to ECHO virus (047.1†)
** 321.3* Meningitis due to herpes zoster virus (053.0†)
** 321.4* Meningitis due to herpes simplex virus (054.7†)
** 321.5* Meningitis due to mumps virus (072.1†)
** 321.6* Meningitis due to lymphocytic choriomeningitis virus (049.0†)
** 321.7* Meningitis due to other and unspecified viruses
** 321.8* Other
* 322 Meningitis of unspecified cause
** 322.0 Nonpyogenic meningitis
** 322.1 Eosinophilic meningitis
** 322.2 Chronic meningitis
** 322.9 Meningitis, unspecified
* 323 Encephalitis, myelitis and encephalomyelitis
** 323.0* Kuru (046.0†)
** 323.1* Subacute sclerosing panencephalitis (046.2†)
** 323.2* Poliomyelitis (045.–†)
** 323.3* Arthropod-borne viral encephalitis (062-064†)
** 323.4* Other encephalitis due to infection
** 323.5 Encephalitis following immunization procedures
** 323.6* Postinfectious encephalitis
** 323.7* Toxic encephalitis
** 323.8 Other
** 323.9 Unspecified cause
* 324 Intracranial and intraspinal abscess
** 324.0 Intracranial abscess
** 324.1 Intraspinal abscess
** 324.9 Of unspecified site
* 325 Phlebitis and thrombophlebitis of intracranial venous sinuses
* 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 Leucodystrophy
** 330.1 Cerebral lipidoses
** 330.2* Cerebral degeneration in generalized lipidoses (272.7†)
** 330.3* Cerebral degeneration of childhood in other diseases classified elsewhere
** 330.8 Other cerebral degenerations in childhood
** 330.9 Unspecified
* 331 Other cerebral degenerations
** 331.0 Alzheimer's disease
** 331.1 Pick's disease
** 331.2 Senile degeneration of brain
** 331.3 Communicating hydrocephalus
** 331.4 Obstructive hydrocephalus
** 331.5* Jakob-Creutzfeldt disease (046.1†)
** 331.6* Progressive multifocal leucoencephalopathy (046.3†)
** 331.7* Cerebral degeneration in other diseases classified elsewhere
** 331.8 Other cerebral degeneration
** 331.9 Unspecified
* 332 Parkinson's disease
** 332.0 Paralysis agitans
** 332.1 Secondary Parkinsonism
* 333 Other extrapyramidal disease and abnormal movement disorders
** 333.0 Other degenerative diseases of the basal ganglia
** 333.1 Essential and other specified forms of tremor
** 333.2 Myoclonus
** 333.3 Tics of organic origin
** 333.4 Huntington's chorea
** 333.5 Other choreas
** 333.6 Idiopathic torsion dystonia
** 333.7 Symptomatic torsion dystonia
** 333.8 Fragments of torsion dystonia
** 333.9 Other and unspecified
* 334 Spinocerebellar disease
** 334.0 Friedreich's 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
** 334.9 Unspecified
* 335 Anterior horn cell disease
** 335.0 Werdnig-Hoffmann disease
** 335.1 Spinal muscular atrophy
** 335.2 Motor neurone disease
** 335.8 Other
** 335.9 Unspecified
* 336 Other diseases of spinal cord
** 336.0 Syringomyelia and syringobulbia
** 336.1 Vascular myelopathies
** 336.2* Subacute combined degeneration of spinal cord (266.2, 281.0, 281.1†)
** 336.3* Myelopathy in other diseases classified elsewhere
** 336.8 Other myelopathy
** 336.9 Unspecified diseases of spinal cord
* 337 Disorders of the autonomic nervous system
** 337.0 Idiopathic peripheral autonomic neuropathy
** 337.1* Peripheral autonomic neuropathy in disorders classified elsewhere
** 337.9 Unspecified

## Other disorders of the central nervous system (340–349)

* 340 Multiple sclerosis
* 341 Other demyelinating diseases of central nervous system
** 341.0 Neuromyelitis optica
** 341.1 Schilder's disease
** 341.8 Other
** 341.9 Unspecified
* 342 Hemiplegia
** 342.0 Flaccid hemiplegia
** 342.1 Spastic hemiplegia
** 342.9 Unspecified
* 343 Infantile cerebral palsy
** 343.0 Diplegic
** 343.1 Hemiplegic
** 343.2 Quadriplegic
** 343.3 Monoplegic
** 343.4 Infantile hemiplegia
** 343.8 Other
** 343.9 Unspecified
* 344 Other paralytic syndromes
** 344.0 Quadriplegia
** 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
** 344.9 Unspecified
* 345 Epilepsy
** 345.0 Generalized nonconvulsive epilepsy
** 345.1 Generalized convulsive epilepsy
** 345.2 Petit mal status
** 345.3 Grand mal status
** 345.4 Partial epilepsy, with impairment of consciousness
** 345.5 Partial epilepsy, without mention of impairment of consciousness
** 345.6 Infantile spasms
** 345.7 Epilepsia partialis continua
** 345.8 Other
** 345.9 Unspecified
* 346 Migraine
** 346.0 Classical migraine
** 346.1 Common migraine
** 346.2 Variants of migraine
** 346.8 Other
** 346.9 Unspecified
* 347 Cataplexy and narcolepsy
* 348 Other conditions of brain
** 348.0 Cerebral cysts
** 348.1 Anoxic brain damage
** 348.2 Benign intracranial hypertension
** 348.3 Encephalopathy, unspecified
** 348.4 Compression of brain
** 348.5 Cerebral oedema
** 348.8 Other
** 348.9 Unspecified
* 349 Other and unspecified disorders of the nervous system
** 349.0 Reaction to spinal or lumbar puncture
** 349.1 Nervous system complications from surgically implanted device
** 349.2 Disorders of meninges, not elsewhere classified
** 349.8 Other
** 349.9 Unspecified

## Disorders of the peripheral nervous system (350–359)

* 350 Trigeminal nerve disorders
** 350.0* Post-herpetic trigeminal neuralgia (053.1†)
** 350.1 Other trigeminal neuralgia
** 350.2 Atypical face pain
** 350.8 Other
** 350.9 Unspecified
* 351 Facial nerve disorders
** 351.0 Bell's palsy
** 351.1 Geniculate ganglionitis
** 351.8 Other
** 351.9 Unspecified
* 352 Disorders of other cranial nerves
** 352.0 Disorders of olfactory [1st] nerve
** 352.1 Glossopharyngeal neuralgia
** 352.2 Other disorders of glossopharyngeal [9th] nerve
** 352.3 Disorders of pneumogastric [10th] nerve
** 352.4 Disorders of accessory [11th] nerve
** 352.5 Disorders of hypoglossal [12th] nerve
** 352.6 Multiple cranial nerve palsies
** 352.9 Unspecified
* 353 Nerve root and plexus disorders
** 353.0 Brachial plexus lesions
** 353.1 Lumbosacral plexus lesions
** 353.2 Cervical root lesions, not elsewhere classified
** 353.3 Thoracic root lesions, not elsewhere classified
** 353.4 Lumbosacral root lesions, not elsewhere classified
** 353.5 Neuralgic amyotrophy
** 353.6 Phantom limb syndrome
** 353.8 Other
** 353.9 Unspecified
* 354 Mononeuritis of upper limb and mononeuritis multiplex
** 354.0 Carpal tunnel syndrome
** 354.1 Other lesion of median nerve
** 354.2 Lesion of ulnar nerve
** 354.3 Lesion of radial nerve
** 354.4 Causalgia
** 354.5 Mononeuritis multiplex
** 354.8 Other
** 354.9 Unspecified
* 355 Mononeuritis of lower limb
** 355.0 Lesion of sciatic nerve
** 355.1 Meralgia paraesthetica
** 355.2 Lesion of femoral nerve
** 355.3 Lesion of lateral popliteal nerve
** 355.4 Lesion of medial popliteal nerve
** 355.5 Tarsal tunnel syndrome
** 355.6 Lesion of plantar nerve
** 355.7 Other
** 355.8 Unspecified mononeuritis of lower limb
** 355.9 Mononeuritis of unspecified site
* 356 Hereditary and idiopathic peripheral neuropathy
** 356.0 Hereditary peripheral neuropathy
** 356.1 Peroneal muscular atrophy
** 356.2 Hereditary sensory neuropathy
** 356.3 Refsum's disease
** 356.4 Idiopathic progressive polyneuropathy
** 356.8 Other
** 356.9 Unspecified
* 357 Inflammatory and toxic neuropathy
** 357.0 Acute infective polyneuritis
** 357.1* Polyneuropathy in collagen vascular disease
** 357.2* Polyneuropathy in diabetes (250.5†)
** 357.3* Polyneuropathy in malignant disease (140–208†)
** 357.4* Polyneuropathy in other diseases classified elsewhere
** 357.5 Alcoholic polyneuropathy
** 357.6 Polyneuropathy due to drugs
** 357.7 Polyneuropathy due to other toxic agents
** 357.8 Other
** 357.9 Unspecified
* 358 Myoneural disorders
** 358.0 Myasthenia gravis
** 358.1* Myasthenic syndromes in diseases classified elsewhere
** 358.2 Toxic myoneural disorders
** 358.8 Other
** 358.9 Unspecified
* 359 Muscular dystrophies and other myopathies
** 359.0 Congenital hereditary muscular dystrophy
** 359.1 Hereditary progressive muscular dystrophy
** 359.2 Myotonic disorders
** 359.3 Familial periodic paralysis
** 359.4 Toxic myopathy
** 359.5* Endocrine myopathy
** 359.6* Symptomatic inflammatory myopathy
** 359.8 Other
** 359.9 Unspecified

## Disorders of the eye and adnexa (360–379)

* 360 Disorders of the globe
** 360.0 Purulent endophthalmitis
** 360.1 Other endophthalmitis
** 360.2 Degenerative disorders of globe
** 360.3 Hypotony of eye
** 360.4 Degenerated conditions of globe
** 360.5 Retained (old) intraocular foreign body, magnetic
** 360.6 Retained (old) intraocular foreign body, nonmagnetic
** 360.8 Other disorders of globe
** 360.9 Unspecified
* 361 Retinal detachments and defects
** 361.0 Retinal detachment with retinal defect
** 361.1 Retinoschisis and retinal cysts
** 361.2 Serous retinal detachment
** 361.3 Retinal defects without detachment
** 361.8 Other forms of retinal detachment
** 361.9 Unspecified
* 362 Other retinal disorders
** 362.0* Diabetic retinopathy (250.4†)
** 362.1 Other background retinopathy and retinal vascular changes
** 362.2 Other proliferative retinopathy
** 362.3 Retinal vascular occlusion
** 362.4 Separation of retinal layers
** 362.5 Degeneration of macula and posterior pole
** 362.6 Peripheral retinal degenerations
** 362.7 Hereditary retinal dystrophies
** 362.8 Other retinal disorders
** 362.9 Unspecified
* 363 Chorioretinal inflammations and scars and other disorders of choroid
** 363.0 Focal chorioretinitis and focal retinochoroiditis
** 363.1 Disseminated chorioretinitis and disseminated retinochoroiditis
** 363.2 Other and unspecified forms of chorioretinitis and retinochoroiditis
** 363.3 Chorioretinal scars
** 363.4 Choroidal degenerations
** 363.6 Choroidal haemorrhage and rupture
** 363.7 Choroidal detachment
** 363.8 Other disorders of choroid
** 363.9 Unspecified
* 364 Disorders of iris and ciliary body
** 364.0 Acute and subacute iridocyclitis
** 364.1 Chronic iridocyclitis
** 364.2 Certain types of iridocyclitis
** 364.3 Unspecified iridocyclitis
** 364.4 Vascular disorders of iris and ciliary body
** 364.5 Degenerations of iris and ciliary body
** 364.6 Cysts of iris, ciliary body and anterior chamber
** 364.7 Adhesions and disruptions of iris and ciliary body
** 364.8 Other disorders of iris and ciliary body
** 364.9 Unspecified
* 365 Glaucoma
** 365.0 Borderline glaucoma
** 365.1 Open-angle glaucoma
** 365.2 Primary angle-closure glaucoma
** 365.3 Corticosteroid-induced glaucoma
** 365.4 Glaucoma associated with congenital anomalies, with dystrophies and with systemic syndromes
** 365.5 Glaucoma associated with disorders of the lens
** 365.6 Glaucoma associated with other ocular disorders
** 365.8 Other glaucoma
** 365.9 Unspecified
* 366 Cataract
** 366.0 Infantile, juvenile and presenile cataract
** 366.1 Senile cataract
** 366.2 Traumatic cataract
** 366.3 Cataract secondary to ocular disorders
** 366.4 Cataract associated with other disorders
** 366.5 After-cataract
** 366.8 Other cataract
** 366.9 Unspecified
* 367 Disorders of refraction and accommodation
** 367.0 Hypermetropia
** 367.1 Myopia
** 367.2 Astigmatism
** 367.3 Anisometropia and aniseikonia
** 367.4 Presbyopia
** 367.5 Disorders of accommodation
** 367.8 Other
** 367.9 Unspecified
* 368 Visual disturbances
** 368.0 Amblyopia ex anopsia
** 368.1 Subjective visual disturbances
** 368.2 Diplopia
** 368.3 Other disorders of binocular vision
** 368.4 Visual field defects
** 368.5 Colour vision deficiencies
** 368.6 Night blindness
** 368.8 Other visual disturbances
** 368.9 Unspecified
* 369 Blindness and low vision
** 369.0 Blindness, both eyes
** 369.1 Blindness, one eye, low vision other eye
** 369.2 Low vision, both eyes
** 369.3 Unqualified visual loss, both eyes
** 369.4 Legal blindness, as defined in U.S.A.
** 369.6 Blindness, one eye
** 369.7 Low vision, one eye
** 369.8 Unqualified visual loss, one eye
** 369.9 Unspecified visual loss
* 370 Keratitis
** 370.0 Corneal ulcer
** 370.1* Dendritic keratitis (054.4†)
** 370.2 Other superficial keratitis without conjunctivitis
** 370.3 Certain types of keratoconjunctivitis
** 370.4 Other and unspecified keratoconjunctivitis
** 370.5 Interstitial and deep keratitis
** 370.6 Corneal neovascularization
** 370.8 Other forms of keratitis
** 370.9 Unspecified
* 371 Corneal opacity and other disorders of cornea
** 371.0 Corneal scars and opacities
** 371.1 Corneal pigmentations and deposits
** 371.2 Corneal oedema
** 371.3 Changes of corneal membranes
** 371.4 Corneal degenerations
** 371.5 Hereditary corneal dystrophies
** 371.6 Keratoconus
** 371.7 Other corneal deformities
** 371.8 Other corneal disorders
** 371.9 Unspecified
* 372 Disorders of conjunctiva
** 372.0 Acute conjunctivitis
** 372.1 Chronic conjunctivitis
** 372.2 Blepharoconjunctivitis
** 372.3 Other and unspecified conjunctivitis
** 372.4 Pterygium
** 372.5 Conjunctival degenerations and deposits
** 372.6 Conjunctival scars
** 372.7 Conjunctival vascular disorders and cysts
** 372.8 Other disorders of conjunctiva
** 372.9 Unspecified
* 373 Inflammation of eyelids
** 373.0 Blepharitis
** 373.2 Chalazion
** 373.3 Noninfectious dermatoses of eyelid
** 373.4* Infective dermatitis of eyelid of types resulting in deformity
** 373.5* Other infective dermatitis of eyelid
** 373.6* Parasitic infestation of eyelid
** 373.8 Other
** 373.9 Unspecified
* 374 Other disorders of eyelids
** 374.0 Entropion and trichiasis of eyelid
** 374.1 Ectropion
** 374.2 Lagophthalmos
** 374.3 Ptosis of eyelid
** 374.4 Other disorders affecting eyelid function
** 374.5 Degenerative disorders of eyelids and periocular area
** 374.8 Other disorders of eyelid
** 374.9 Unspecified
* 375 Disorders of lacrimal system
** 375.0 Dacryoadenitis
** 375.1 Other disorders of lacrimal gland
** 375.2 Epiphora
** 375.3 Acute and unspecified inflammation of lacrimal passages
** 375.4 Chronic inflammation of lacrimal passages
** 375.5 Stenosis and insufficiency of lacrimal passages
** 375.6 Other changes of lacrimal passages
** 375.8 Other disorders of lacrimal system
** 375.9 Unspecified
* 376 Disorders of the orbit
** 376.0 Acute inflammation of orbit
** 376.1 Chronic inflammatory disorders of orbit
** 376.2* Endocrine exophthalmos
** 376.3 Other exophthalmic conditions
** 376.4 Deformity of orbit
** 376.5 Enophthalmos
** 376.6 Retained (old) foreign body following penetrating wound of orbit
** 376.8 Other disorders of orbit
** 376.9 Unspecified
* 377 Disorders of optic nerve and visual pathways
** 377.0 Papilloedema
** 377.1 Optic atrophy
** 377.2 Other disorders of optic disc
** 377.3 Optic neuritis
** 377.4 Other disorders of optic nerve
** 377.5 Disorders of optic chiasm
** 377.6 Disorders of other visual pathways
** 377.7 Disorders of visual cortex
** 377.9 Unspecified
* 378 Strabismus and other disorders of binocular eye movements
** 378.0 Convergent concomitant strabismus
** 378.1 Divergent concomitant strabismus
** 378.2 Intermittent heterotropia
** 378.3 Other and unspecified heterotropia
** 378.4 Heterophoria
** 378.5 Paralytic strabismus
** 378.6 Mechanical strabismus
** 378.7 Other strabismus
** 378.8 Other disorders of binocular eye movements
** 378.9 Unspecified
* 379 Other disorders of eye
** 379.0 Scleritis and episcleritis
** 379.1 Other disorders of sclera
** 379.2 Disorders of vitreous body
** 379.3 Aphakia and other disorders of lens
** 379.4 Anomalies of pupillary function
** 379.5 Nystagmus and other irregular eye movements
** 379.8 Other disorders of eye and adnexa
** 379.9 Unspecified

## Diseases of the ear and mastoid process (380–389)

* 380 Disorders of external ear
** 380.0 Perichondritis of pinna
** 380.1 Infective otitis externa
** 380.2 Other otitis externa
** 380.3 Noninfective disorders of pinna
** 380.4 Impacted cerumen
** 380.5 Acquired stenosis of external ear canal
** 380.8 Other disorders of external ear
** 380.9 Unspecified
* 381 Nonsuppurative otitis media and Eustachian tube disorders
** 381.0 Acute nonsuppurative otitis media
** 381.1 Chronic serous otitis media
** 381.2 Chronic mucoid otitis media
** 381.3 Other and unspecified chronic nonsuppurative otitis media
** 381.4 Nonsuppurative otitis media, not specified as acute or chronic
** 381.5 Eustachian salpingitis
** 381.6 Obstruction of Eustachian tube
** 381.7 Patulous Eustachian tube
** 381.8 Other disorders of Eustachian tube
** 381.9 Unspecified Eustachian tube disorder
* 382 Suppurative and unspecified otitis media
** 382.0 Acute suppurative otitis media
** 382.1 Chronic tubotympanic suppurative otitis media
** 382.2 Chronic atticoantral suppurative otitis media
** 382.3 Unspecified chronic suppurative otitis media
** 382.4 Unspecified suppurative otitis media
** 382.9 Unspecified otitis media
* 383 Mastoiditis and related conditions
** 383.0 Acute mastoiditis
** 383.1 Chronic mastoiditis
** 383.2 Petrositis
** 383.3 Complications following mastoidectomy
** 383.8 Other
** 383.9 Unspecified mastoiditis
* 384 Other disorders of tympanic membrane
** 384.0 Acute myringitis without mention of otitis media
** 384.1 Chronic myringitis without mention of otitis media
** 384.2 Perforation of tympanic membrane
** 384.8 Other
** 384.9 Unspecified
* 385 Other disorders of middle ear and mastoid
** 385.0 Tympanosclerosis
** 385.1 Adhesive middle ear disease
** 385.2 Other acquired abnormality of ear ossicles
** 385.3 Cholesteatoma of middle ear and mastoid
** 385.8 Other
** 385.9 Unspecified
* 386 Vertiginolls syndromes and other disorders of vestibular system
** 386.0 Ménière's disease
** 386.1 Other and unspecified peripheral vertigo
** 386.2 Vertigo of central origin
** 386.3 Labyrinthitis
** 386.4 Labyrinthine fistula
** 386.5 Labyrinthine dysfunction
** 386.8 Other disorders of labyrinth
** 386.9 Unspecified vertiginous syndromes and labyrinthine disorders
* 387 Otosclerosis
** 387.0 Otosclerosis involving oval window, nonobliterative
** 387.1 Otosclerosis involving oval window, obliterative
** 387.2 Cochlear otosclerosis
** 387.8 Other
** 387.9 Unspecified
* 388 Other disorders of ear
** 388.0 Degenerative and vascular disorders of ear
** 388.1 Noise effects on inner ear
** 388.2 Sudden hearing loss, unspecified
** 388.3 Tinnitus
** 388.4 Other abnormal auditory perception
** 388.5 Disorders of acoustic nerve
** 388.6 Otorrhoea
** 388.7 Otalgia
** 388.8 Other
** 388.9 Unspecified
* 389 Deafness
** 389.0 Conductive deafness
** 389.1 Sensorineural deafness
** 389.2 Mixed conductive and sensorineural deafness
** 389.7 Deaf mutism, not elsewhere classifiable
** 389.8 Other specified forms of deafness
** 389.9 Unspecified deafness
Diseases of the nervous system :
vteMeningitis and other diseases of meningesMeningitis
Arachnoiditis
Bacterial
Tuberculous
Haemophilus
Pneumococcal
Viral
Herpesviral
Fungal
Cryptococcal
Aseptic
Drug-induced
Other
Meningoencephalitis
vteDiseases of the nervous system, primarily CNSInflammationBrain
Encephalitis
Viral encephalitis
Herpesviral encephalitis
Limbic encephalitis
Encephalitis lethargica
Cavernous sinus thrombosis
Brain abscess
Amoebic
Brain and spinal cord
Encephalomyelitis
Acute disseminated
Meningitis
Meningoencephalitis
Brain/ encephalopathyDegenerativeExtrapyramidal and movement disorders
Basal ganglia disease
Parkinsonism
PD
Postencephalitic
NMS
NBIA
PKAN
Tauopathy
PSP
Striatonigral degeneration
Hemiballismus
HD
OA
Dyskinesia
Dystonia
Status dystonicus
Spasmodic torticollis
Meige's
Blepharospasm
Athetosis
Chorea
Choreoathetosis
Myoclonus
Myoclonic epilepsy
Akathisia
Tremor
Essential tremor
Intention tremor
Restless legs
Stiff-person
Dementia
Tauopathy
Alzheimer's
Early-onset
Primary progressive aphasia
Frontotemporal dementia/Frontotemporal lobar degeneration
Pick's
Lewy bodies dementia
Posterior cortical atrophy
Creutzfeldt–Jakob disease
Vascular dementia
Mitochondrial disease
Leigh syndrome
Demyelinating
Autoimmune
Inflammatory
Multiple sclerosis
For more detailed coverage, see Template:Demyelinating diseases of CNS
Episodic/ paroxysmalSeizures and epilepsy
Focal
Generalised
Status epilepticus
For more detailed coverage, see Template:Epilepsy
Headache
Migraine
Cluster
Tension
For more detailed coverage, see Template:Headache
Cerebrovascular
TIA
Stroke
For more detailed coverage, see Template:Cerebrovascular diseases
Other
Sleep disorders
For more detailed coverage, see Template:Sleep
CSF
Intracranial hypertension
Hydrocephalus
Normal pressure hydrocephalus
Choroid plexus papilloma
Idiopathic intracranial hypertension
Cerebral edema
Intracranial hypotension
Other
Brain herniation
Reye syndrome
Hepatic encephalopathy
Toxic encephalopathy
Hashimoto's encephalopathy
Static encephalopathy
Both/eitherDegenerativeSA
Friedreich's ataxia
Ataxia–telangiectasia
MND
UMN only:
Primary lateral sclerosis
Pseudobulbar palsy
Hereditary spastic paraplegia
LMN only:
Distal hereditary motor neuronopathies
Spinal muscular atrophies
SMA
SMAX1
SMAX2
DSMA1
Congenital DSMA
Spinal muscular atrophy with lower extremity predominance (SMALED)
SMALED1
SMALED2A
SMALED2B
SMA-PCH
SMA-PME
Progressive muscular atrophy
Progressive bulbar palsy
Fazio–Londe
Infantile progressive bulbar palsy
both:
Amyotrophic lateral sclerosis
vteDemyelinating diseases of the central nervous systemSigns and symptoms
Ataxia
Depression
Diplopia
Dysarthria
Dysphagia
Fatigue
Incontinence
Nystagmus
Optic neuritis
Pain
Uhthoff's phenomenon
Investigations and diagnosis
Diagnosis of multiple sclerosis
McDonald criteria
Poser criteria
Clinical
Clinically isolated syndrome
Expanded Disability Status Scale
Serological and CSF
Oligoclonal bands
Radiological
Radiologically isolated syndrome
Lesional demyelinations of the central nervous system
Dawson's fingers
Frexalimab
Approved treatment
Management of multiple sclerosis
Alemtuzumab
Cladribine
Dimethyl fumarate
Diroximel fumarate
Fingolimod
Glatiramer acetate
Interferon beta-1a
Interferon beta-1b
Laquinimod
Mitoxantrone
Monomethyl fumarate
Natalizumab
Ocrelizumab (+hyaluronidase)
Ozanimod
Ponesimod
Siponimod
Teriflunomide
Other treatments
Former
Daclizumab
Research in multiple sclerosis
Demyelinating diseasesAutoimmune
Neuromyelitis optica spectrum disorder
Diffuse myelinoclastic sclerosis
MOG antibody disease
Multiple sclerosis
Chronic inflammatory demyelinating polyneuropathy
Inflammatory
Acute disseminated encephalomyelitis
Balo concentric sclerosis
Marburg acute multiple sclerosis
Neuromyelitis optica spectrum disorder
Diffuse myelinoclastic sclerosis
Tumefactive multiple sclerosis
Experimental autoimmune encephalomyelitis
Hereditary
Adrenoleukodystrophy
Alexander disease
Canavan disease
Krabbe disease
Metachromatic leukodystrophy
Pelizaeus–Merzbacher disease
Leukoencephalopathy with vanishing white matter
Megalencephalic leukoencephalopathy with subcortical cysts
CAMFAK syndrome
Other
Central pontine myelinolysis
Marchiafava–Bignami disease
Mitochondrial DNA depletion syndrome
Other
List of multiple sclerosis organizations
List of people with multiple sclerosis
Multiple sclerosis drug pipeline
Pathophysiology
vteSeizures and epilepsyBasics
Seizure types
Aura (warning sign)
Postictal state
Epileptogenesis
Neonatal seizure
Epilepsy in children
Management
Anticonvulsants
Investigations
Electroencephalography
Epileptologist
Personal issues
Epilepsy and driving
Epilepsy and employment
Seizure typesFocal
Seizures
Simple partial
Complex partial
Gelastic seizure
Epilepsy
Temporal lobe epilepsy
Frontal lobe epilepsy
Rolandic epilepsy
Sleep-related hypermotor epilepsy
Panayiotopoulos syndrome
Vertiginous epilepsy
Generalised
Tonic–clonic
Absence seizure
Atonic seizure
Automatism
Benign familial neonatal seizures
Lennox–Gastaut syndrome
Myoclonic astatic epilepsy
Epileptic spasms
Febrile seizure
Status epilepticus
Epilepsia partialis continua
Complex partial status epilepticus
Myoclonic epilepsy
Progressive myoclonus epilepsy
Dentatorubral–pallidoluysian atrophy
Unverricht–Lundborg disease
MERRF syndrome
Lafora disease
Early myoclonic encephalopathy
Juvenile myoclonic epilepsy
Related disorders
Sudden unexpected death in epilepsy
Todd's paresis
Landau–Kleffner syndrome
Psychogenic non-epileptic seizure
Epilepsy in animals
Organizations
Citizens United for Research in Epilepsy (US)
Epilepsy Action (UK)
Epilepsy Action Australia
Epilepsy Foundation (US)
Epilepsy Outlook (UK)
Epilepsy Research UK
Epilepsy Society (UK)
vteHeadachePrimaryICHD 1
Migraine
Familial hemiplegic
Retinal migraine
ICHD 2
Tension
Mixed tension migraine
ICHD 3
Cluster
Chronic paroxysmal hemicrania
SUNCT
ICHD 4
Hemicrania continua
Thunderclap headache
Sexual headache
New daily persistent headache
Hypnic headache
SecondaryICHD 5
Migralepsy
ICHD 7
Ictal headache
Post-dural-puncture headache
ICHD 8
Hangover
Medication overuse headache
ICHD 13
Trigeminal neuralgia
Occipital neuralgia
External compression headache
Cold-stimulus headache
Optic neuritis
Postherpetic neuralgia
Tolosa–Hunt syndrome
Other
Eye strain
Orthostatic
Vascular
vteCerebrovascular diseases including strokeIschaemic strokeBrain
Anterior cerebral artery syndrome
Middle cerebral artery syndrome
Posterior cerebral artery syndrome
Amaurosis fugax
Moyamoya disease
Dejerine–Roussy syndrome
Watershed stroke
Lacunar stroke
Brain stem
Brainstem stroke syndrome
Medulla
Medial medullary syndrome
Lateral medullary syndrome
Pons
Medial pontine syndrome / Foville's
Lateral pontine syndrome / Millard-Gubler
Midbrain
Weber's syndrome
Benedikt syndrome
Claude's syndrome
Cerebellum
Cerebellar stroke syndrome
Extracranial arteries
Carotid artery stenosis
precerebral
Anterior spinal artery syndrome
Vertebrobasilar insufficiency
Subclavian steal syndrome
Classification
Brain ischemia
Cerebral infarction
Classification
Transient ischemic attack
Total anterior circulation infarct
Partial anterior circulation infarct
Other
CADASIL
Binswanger's disease
Transient global amnesia
Haemorrhagic strokeExtra-axial
Epidural
Subdural
Subarachnoid
Cerebral/Intra-axial
Intraventricular
Brainstem
Duret haemorrhages
General
Intracranial hemorrhage
Aneurysm
Intracranial aneurysm
Charcot–Bouchard aneurysm
Other
Cerebral vasculitis
Cerebral venous sinus thrombosis
vteSleep and sleep disordersStages of sleep cycles
Rapid eye movement (REM)
Quiescent sleep
Slow-wave
Brain waves
Alpha wave
Beta wave
Delta wave
Gamma wave
K-complex
Mu rhythm
PGO waves
Sensorimotor rhythm
Sleep spindle
Theta wave
Sleep disordersAnatomical
Bruxism
Mouth breathing
Sleep apnea
Catathrenia
Central hypoventilation syndrome
Obesity hypoventilation syndrome
Obstructive sleep apnea
Periodic breathing
Snoring
Dyssomnia
Excessive daytime sleepiness
Hypersomnia
Insomnia
Kleine–Levin syndrome
Narcolepsy
Idiopathic hypersomnia
Night eating syndrome
Nocturia
Sleep state misperception
Circadian rhythm disorders
Advanced sleep phase disorder
Cyclic alternating pattern
Delayed sleep phase disorder
Irregular sleep–wake rhythm
Jet lag
Non-24-hour sleep–wake disorder
Shift work sleep disorder
Parasomnia
Nightmare disorder
Night terror
Periodic limb movement disorder
Rapid eye movement sleep behavior disorder
Sleepwalking
Sleep driving
Sleep-talking
Benign phenomena
Dreams
Exploding head syndrome
Hypnic jerk
Hypnagogia / Sleep onset
Hypnopompia
Sleep paralysis
Sleep inertia
Somnolence
Nocturnal clitoral tumescence
Nocturnal penile tumescence
Nocturnal emission
Treatment
Sleep diary
Sleep hygiene
Sleep induction
Hypnosis
Lullaby
Somnology
Polysomnography
Other
Sleep medicine
Behavioral sleep medicine
Sleep study
Melatonin
Neuroscience of sleep
Daily life
Bed
Bunk bed
Daybed
Four-poster bed
Futon
Hammock
Mattress
Sleeping bag
Bed bug
Bedding
Bedroom
Bedtime
Procrastination
Story
Biphasic and polyphasic sleep
Chronotype
Circadian rhythm
Comfort object
Dream diary
Microsleep
Nap
Nightwear
Power nap
Second wind
Siesta
Sleep and breathing
Sleep and creativity
Sleep and learning
Sleep and memory
Sleep deprivation / Sleep debt
Sleeping while on duty
Sleepover
vteDiseases relating to the peripheral nervous systemMononeuropathyArmmedian nerve
Carpal tunnel syndrome
Ape hand deformity
ulnar nerve
Ulnar nerve entrapment
Froment's sign
Ulnar tunnel syndrome
Ulnar claw
radial nerve
Radial neuropathy
Wrist drop
Cheiralgia paresthetica
long thoracic nerve
Winged scapula
Backpack palsy
Leglateral cutaneous nerve of thigh
Meralgia paraesthetica
tibial nerve
Tarsal tunnel syndrome
plantar nerve
Morton's neuroma
superior gluteal nerve
Trendelenburg's sign
sciatic nerve
Piriformis syndrome
Cranial nerves
See Template:Cranial nerve disease
Polyneuropathy and PolyradiculoneuropathyHMSN
Charcot–Marie–Tooth disease
Dejerine–Sottas disease
Refsum's disease
Hereditary spastic paraplegia
Hereditary neuropathy with liability to pressure palsy
Familial amyloid neuropathy
Autoimmune and demyelinating disease
Guillain–Barré syndrome
Chronic inflammatory demyelinating polyneuropathy
Radiculopathy and plexopathy
Brachial plexus injury
Pectoralis minor syndrome
Thoracic outlet syndrome
Phantom limb
Other
Alcoholic polyneuropathy
OtherGeneral
Complex regional pain syndrome
Mononeuritis multiplex
Nerve compression syndrome
Neuralgia
Peripheral neuropathy
vteDiseases of muscle, neuromuscular junction, and neuromuscular diseaseNeuromuscular- junction disease
autoimmune
Myasthenia gravis
Lambert–Eaton myasthenic syndrome
Neuromyotonia
Congenital myasthenic syndrome
MyopathyMuscular dystrophy (DAPC)AD
Limb-girdle muscular dystrophy 1
Oculopharyngeal
Facioscapulohumeral
Myotonic
Distal (most)
AR
Calpainopathy
Limb-girdle muscular dystrophy 2
Congenital
Fukuyama
Ullrich
Walker–Warburg
XR
dystrophin
Becker's
Duchenne
Emery–Dreifuss
Other structural
collagen disease
Bethlem myopathy
PTP disease
X-linked MTM
adaptor protein disease
BIN1-linked centronuclear myopathy
cytoskeleton disease
Nemaline myopathy
Zaspopathy
Channelopathy
(ion channel)Myotonia
Myotonia congenita
Thomsen disease
Becker disease
Neuromyotonia
Isaacs syndrome
Paramyotonia congenita
Periodic paralysis
Hypokalemic
Thyrotoxic
Hyperkalemic
Other
Central core disease
ATPase disorder
(ion pump)
Brody disease (ATP2A1)
Metabolic myopathy
Muscle Glycogen storage disease
Fatty-acid metabolism disorder
AMPD1 deficiency
Mitochondrial myopathy (MELAS
MERRF
KSS
PEO
MNGIE)
Endocrinopathy
Hypothyroid myopathy
Kocher–Debre–Semelaigne syndrome
Hoffmann syndrome
Hyperthyroid myopathy
Thyrotoxic myopathy
Hypoparathyroid myopathy
Hyperparathyroid myopathy
Hypercortisolism
Corticosteroid myopathy
Testosterone deficiency myopathy
Late-onset hypogonadism
Hypogonadotropic hypogonadism
Androgen deficiency
General
Inflammatory myopathy
Congenital myopathy
vteSigns and symptoms relating to movement and gaitGait
Gait abnormality
CNS
Scissor gait
Cerebellar ataxia
Choreic gait
Festinating gait/Parkinsonian gait
Magnetic gait
Marche à petit pas
Propulsive gait
Stomping gait
Spastic gait
Truncal ataxia
Vestibular gait
Muscular
Myopathic gait/Waddling gait
Trendelenburg gait
Pigeon gait
Foot drop
Steppage gait
Toe walking
Asymmetric gait
Leaping gait
Asynchronous gait
Gunslinger's gait
Hemiparetic gait
Limp
Antalgic gait
Deformity
Lotus gait
Coordination
Ataxia
Cerebellar ataxia
Dysmetria
Dysdiadochokinesia
Pronator drift
Dyssynergia
Sensory ataxia
Asterixis
Abasia
Hemimotor neglect
Abnormal movement
Athetosis
Chorea
Tremor
Fasciculation
Fibrillation
Myokymia
Myoclonus
Hyperkinesia / Hypokinesia
Myotonia / Pseudomyotonia
Hypotonia
Stereotypy
Akathisia
Echopraxia
Echolalia
Posturing
Abnormal posturing
Stooped posture
Camptocormia
Osteoporosis
Opisthotonus
Spasm
Trismus
Cramp
Tetany
Hypertonia
Joint locking
Catalepsy
Waxy flexibility
Grimacing
Tonic immobility
Paralysis
Flaccid paralysis
Periodic paralysis
Spastic paraplegia
Spastic diplegia
Spastic paraplegia
Syndromes
Monoplegia
Diplegia / Paraplegia
Hemiplegia
Triplegia
Tetraplegia / Quadruplegia
General causes
Upper motor neuron lesion
Lower motor neuron lesion
Sleep paralysis
Weakness
Hemiparesis
Gowers' sign
Locomotive syndrome
Ptosis
Range of motion
Contracture
Bethlem sign
Club foot
Joint stiffness
Ankylosis
Hypermobility
Gorlin sign
EDS
HSD
Boutonniere deformity
Swan neck deformity
Scoliosis
Kyphosis
Other
Rachitic rosary
Flat feet
Overpronation/Flexible flat feet
Knock-knee
Bow-leggedness
Back knee
Hyporeflexia
Hyperreflexia
Clasp-knife response
Shivering
Hypnic jerk
Astasia-abasia
Vertigo
Motion sickness
Conversion disorder
Shell shock
Stupor
Catatonia
Dancing mania
vteDiseases of the autonomic nervous systemGeneral
Dysautonomia
Autonomic dysreflexia
Autonomic neuropathy
Pure autonomic failure
Hereditary
Hereditary sensory and autonomic neuropathy
Familial dysautonomia
Congenital insensitivity to pain with anhidrosis
Orthostatic intolerance
Orthostatic hypotension
Postural orthostatic tachycardia syndrome
Other
Horner's syndrome
Multiple system atrophy :