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.

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) Bacterial meningitis Haemophilus meningitis Pneumococcal meningitis Streptococcal meningitis Staphylococcal meningitis * Tuberculous meningitis (†) * Meningococcal meningitis (†) * Meningitis in other bacterial diseases classified elsewhere Meningitis due to other specified bacteria Meningitis due to unspecified bacterium * Meningitis due to other organisms * Fungal meningitis (110–118†) * Meningitis due to Coxsackie virus (†) * Meningitis due to ECHO virus (†) * Meningitis due to herpes zoster virus (†) * Meningitis due to herpes simplex virus (†) * Meningitis due to mumps virus (†) * Meningitis due to lymphocytic choriomeningitis virus (†) * Meningitis due to other and unspecified viruses * Other Meningitis of unspecified cause Nonpyogenic meningitis Eosinophilic meningitis Chronic meningitis Meningitis, unspecified Encephalitis, myelitis and encephalomyelitis * Kuru (†) * Subacute sclerosing panencephalitis (†) * Poliomyelitis (045.–†) * Arthropod-borne viral encephalitis (062-064†) * Other encephalitis due to infection Encephalitis following immunization procedures * Postinfectious encephalitis * Toxic encephalitis Other Unspecified cause Intracranial and intraspinal abscess Intracranial abscess Intraspinal abscess Of unspecified site Phlebitis and thrombophlebitis of intracranial venous sinuses 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 Leucodystrophy Cerebral lipidoses * Cerebral degeneration in generalized lipidoses (†) * Cerebral degeneration of childhood in other diseases classified elsewhere Other cerebral degenerations in childhood Unspecified Other cerebral degenerations Alzheimer's disease Pick's disease Senile degeneration of brain Communicating hydrocephalus Obstructive hydrocephalus * Jakob-Creutzfeldt disease (†) * Progressive multifocal leucoencephalopathy (†) * Cerebral degeneration in other diseases classified elsewhere Other cerebral degeneration Unspecified Parkinson's disease Paralysis agitans Secondary Parkinsonism Other extrapyramidal disease and abnormal movement disorders Other degenerative diseases of the basal ganglia Essential and other specified forms of tremor Myoclonus Tics of organic origin Huntington's chorea Other choreas Idiopathic torsion dystonia Symptomatic torsion dystonia Fragments of torsion dystonia Other and unspecified Spinocerebellar disease Friedreich's ataxia Hereditary spastic paraplegia Primary cerebellar degeneration Other cerebellar ataxia * Cerebellar ataxia in diseases classified elsewhere Other Unspecified Anterior horn cell disease Werdnig-Hoffmann disease Spinal muscular atrophy Motor neurone disease Other Unspecified Other diseases of spinal cord Syringomyelia and syringobulbia Vascular myelopathies * Subacute combined degeneration of spinal cord (, , †) * Myelopathy in other diseases classified elsewhere Other myelopathy Unspecified diseases of spinal cord Disorders of the autonomic nervous system Idiopathic peripheral autonomic neuropathy * Peripheral autonomic neuropathy in disorders classified elsewhere Unspecified

Other disorders of the central nervous system (340–349) Multiple sclerosis Other demyelinating diseases of central nervous system Neuromyelitis optica Schilder's disease Other Unspecified Hemiplegia Flaccid hemiplegia Spastic hemiplegia Unspecified Infantile cerebral palsy Diplegic Hemiplegic Quadriplegic Monoplegic Infantile hemiplegia Other Unspecified Other paralytic syndromes Quadriplegia Paraplegia Diplegia of upper limbs Monoplegia of lower limb Monoplegia of upper limb Unspecified monoplegia Cauda equina syndrome Other Unspecified Epilepsy Generalized nonconvulsive epilepsy Generalized convulsive epilepsy Petit mal status Grand mal status Partial epilepsy, with impairment of consciousness Partial epilepsy, without mention of impairment of consciousness Infantile spasms Epilepsia partialis continua Other Unspecified Migraine Classical migraine Common migraine Variants of migraine Other Unspecified Cataplexy and narcolepsy Other conditions of brain Cerebral cysts Anoxic brain damage Benign intracranial hypertension Encephalopathy, unspecified Compression of brain Cerebral oedema Other Unspecified Other and unspecified disorders of the nervous system Reaction to spinal or lumbar puncture Nervous system complications from surgically implanted device Disorders of meninges, not elsewhere classified Other Unspecified

Disorders of the peripheral nervous system (350–359) Trigeminal nerve disorders * Post-herpetic trigeminal neuralgia (†) Other trigeminal neuralgia Atypical face pain Other Unspecified Facial nerve disorders Bell's palsy Geniculate ganglionitis Other Unspecified Disorders of other cranial nerves Disorders of olfactory [1st] nerve Glossopharyngeal neuralgia Other disorders of glossopharyngeal [9th] nerve Disorders of pneumogastric [10th] nerve Disorders of accessory [11th] nerve Disorders of hypoglossal [12th] nerve Multiple cranial nerve palsies Unspecified Nerve root and plexus disorders Brachial plexus lesions Lumbosacral plexus lesions Cervical root lesions, not elsewhere classified Thoracic root lesions, not elsewhere classified Lumbosacral root lesions, not elsewhere classified Neuralgic amyotrophy Phantom limb syndrome Other Unspecified Mononeuritis of upper limb and mononeuritis multiplex Carpal tunnel syndrome Other lesion of median nerve Lesion of ulnar nerve Lesion of radial nerve Causalgia Mononeuritis multiplex Other Unspecified Mononeuritis of lower limb Lesion of sciatic nerve Meralgia paraesthetica Lesion of femoral nerve Lesion of lateral popliteal nerve Lesion of medial popliteal nerve Tarsal tunnel syndrome Lesion of plantar nerve Other Unspecified mononeuritis of lower limb Mononeuritis of unspecified site Hereditary and idiopathic peripheral neuropathy Hereditary peripheral neuropathy Peroneal muscular atrophy Hereditary sensory neuropathy Refsum's disease Idiopathic progressive polyneuropathy Other Unspecified Inflammatory and toxic neuropathy Acute infective polyneuritis * Polyneuropathy in collagen vascular disease * Polyneuropathy in diabetes (†) * Polyneuropathy in malignant disease (140–208†) * Polyneuropathy in other diseases classified elsewhere Alcoholic polyneuropathy Polyneuropathy due to drugs Polyneuropathy due to other toxic agents Other Unspecified Myoneural disorders Myasthenia gravis * Myasthenic syndromes in diseases classified elsewhere Toxic myoneural disorders Other Unspecified Muscular dystrophies and other myopathies Congenital hereditary muscular dystrophy Hereditary progressive muscular dystrophy Myotonic disorders Familial periodic paralysis Toxic myopathy * Endocrine myopathy * Symptomatic inflammatory myopathy Other Unspecified

Disorders of the eye and adnexa (360–379) Disorders of the globe Purulent endophthalmitis Other endophthalmitis Degenerative disorders of globe Hypotony of eye Degenerated conditions of globe Retained (old) intraocular foreign body, magnetic Retained (old) intraocular foreign body, nonmagnetic Other disorders of globe Unspecified Retinal detachments and defects Retinal detachment with retinal defect Retinoschisis and retinal cysts Serous retinal detachment Retinal defects without detachment Other forms of retinal detachment Unspecified Other retinal disorders * Diabetic retinopathy (†) Other background retinopathy and retinal vascular changes Other proliferative retinopathy Retinal vascular occlusion Separation of retinal layers Degeneration of macula and posterior pole Peripheral retinal degenerations Hereditary retinal dystrophies Other retinal disorders Unspecified Chorioretinal inflammations and scars and other disorders of choroid Focal chorioretinitis and focal retinochoroiditis Disseminated chorioretinitis and disseminated retinochoroiditis Other and unspecified forms of chorioretinitis and retinochoroiditis Chorioretinal scars Choroidal degenerations Choroidal haemorrhage and rupture Choroidal detachment Other disorders of choroid Unspecified Disorders of iris and ciliary body Acute and subacute iridocyclitis Chronic iridocyclitis Certain types of iridocyclitis Unspecified iridocyclitis Vascular disorders of iris and ciliary body Degenerations of iris and ciliary body Cysts of iris, ciliary body and anterior chamber Adhesions and disruptions of iris and ciliary body Other disorders of iris and ciliary body Unspecified Glaucoma Borderline glaucoma Open-angle glaucoma Primary angle-closure glaucoma Corticosteroid-induced glaucoma Glaucoma associated with congenital anomalies, with dystrophies and with systemic syndromes Glaucoma associated with disorders of the lens Glaucoma associated with other ocular disorders Other glaucoma Unspecified Cataract Infantile, juvenile and presenile cataract Senile cataract Traumatic cataract Cataract secondary to ocular disorders Cataract associated with other disorders After-cataract Other cataract Unspecified Disorders of refraction and accommodation Hypermetropia Myopia Astigmatism Anisometropia and aniseikonia Presbyopia Disorders of accommodation Other Unspecified Visual disturbances Amblyopia ex anopsia Subjective visual disturbances Diplopia Other disorders of binocular vision Visual field defects Colour vision deficiencies Night blindness Other visual disturbances Unspecified Blindness and low vision Blindness, both eyes Blindness, one eye, low vision other eye Low vision, both eyes Unqualified visual loss, both eyes Legal blindness, as defined in U.S.A. Blindness, one eye Low vision, one eye Unqualified visual loss, one eye Unspecified visual loss Keratitis Corneal ulcer * Dendritic keratitis (†) Other superficial keratitis without conjunctivitis Certain types of keratoconjunctivitis Other and unspecified keratoconjunctivitis Interstitial and deep keratitis Corneal neovascularization Other forms of keratitis Unspecified Corneal opacity and other disorders of cornea Corneal scars and opacities Corneal pigmentations and deposits Corneal oedema Changes of corneal membranes Corneal degenerations Hereditary corneal dystrophies Keratoconus Other corneal deformities Other corneal disorders Unspecified Disorders of conjunctiva Acute conjunctivitis Chronic conjunctivitis Blepharoconjunctivitis Other and unspecified conjunctivitis Pterygium Conjunctival degenerations and deposits Conjunctival scars Conjunctival vascular disorders and cysts Other disorders of conjunctiva Unspecified Inflammation of eyelids