list of icd-9 codes 320–389: diseases of the nervous system and sense organs list of icd-9 codes 320–389: diseases of the nervous system and sense organs 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. 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 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 parenthesis, 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 nerve 352.1 glossopharyngeal neuralgia 352.2 other disorders of glossopharyngeal nerve 352.3 disorders of pneumogastric nerve 352.4 disorders of accessory nerve 352.5 disorders of hypoglossal 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