Chapter 6: Diseases of the Nervous System
ICD-10 to ICD-11 crosswalk mappings for codes G00-G99
337 ICD-10 codes in this chapter have ICD-11 crosswalk mappings from the WHO.
Includes codes for epilepsy, migraine, Parkinson's disease, Alzheimer's disease, multiple sclerosis, neuropathies, sleep disorders, and carpal tunnel syndrome. Migraine (G43) and other headache syndromes are extremely common in outpatient coding.
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G00-G09: Inflammatory Diseases of the Central Nervous System
29 codes with ICD-11 mappings
G00Bacterial meningitis, not elsewhere classified1 mappingG00.0Hemophilus meningitis1 mappingG00.1Pneumococcal meningitis1 mappingG00.2Streptococcal meningitis1 mappingG00.3Staphylococcal meningitis1 mappingG00.8Other bacterial meningitis1 mappingG00.9Bacterial meningitis, unspecified1 mappingG01Meningitis in bacterial diseases classified elsewhere1 mappingG02Meningitis in oth infec/parastc diseases classd elswhr1 mappingG03Meningitis due to other and unspecified causes1 mappingG03.0Nonpyogenic meningitis1 mappingG03.1Chronic meningitis1 mappingG03.2Benign recurrent meningitis [Mollaret]1 mappingG03.8Meningitis due to other specified causes1 mappingG03.9Meningitis, unspecified1 mappingG04Encephalitis, myelitis and encephalomyelitis1 mappingG04.0Acute disseminated encephalitis and encephalomyelitis (ADEM)1 mappingG04.1Tropical spastic paraplegia1 mappingG04.2Bacterial meningoencephalitis and meningomyelitis, NEC1 mappingG04.8Other encephalitis, myelitis and encephalomyelitis1 mappingG04.9Encephalitis, myelitis and encephalomyelitis, unspecified1 mappingG05Encphlts, myelitis & encephalomyelitis in dis classd elswhr1 mappingG06Intracranial and intraspinal abscess and granuloma1 mappingG06.0Intracranial abscess and granuloma1 mappingG06.1Intraspinal abscess and granuloma1 mappingG06.2Extradural and subdural abscess, unspecified1 mappingG07Intcrn & intraspinal abscs & granuloma in dis classd elswhr1 mappingG08Intracranial and intraspinal phlebitis and thrombophlebitis1 mappingG09Sequelae of inflammatory diseases of central nervous system1 mapping
G10-G14: Systemic Atrophies Primarily Affecting the Central Nervous System
21 codes with ICD-11 mappings
G10Huntington's disease1 mappingG11Hereditary ataxia1 mappingG11.0Congenital nonprogressive ataxia1 mappingG11.1Early-onset cerebellar ataxia1 mappingG11.2Late-onset cerebellar ataxia1 mappingG11.3Cerebellar ataxia with defective DNA repair1 mappingG11.4Hereditary spastic paraplegia1 mappingG11.8Other hereditary ataxias1 mappingG11.9Hereditary ataxia, unspecified1 mappingG12Spinal muscular atrophy and related syndromes1 mappingG12.0Infantile spinal muscular atrophy, type I [Werdnig-Hoffman]1 mappingG12.1Other inherited spinal muscular atrophy1 mappingG12.2Motor neuron disease1 mappingG12.8Other spinal muscular atrophies and related syndromes1 mappingG12.9Spinal muscular atrophy, unspecified1 mappingG13Systemic atrophies aff cnsl in diseases classd elswhr1 mappingG13.0Paraneoplastic neuromyopathy and neuropathy1 mappingG13.1Oth systemic atrophy aff cnsl in neoplastic disease1 mappingG13.2Systemic atrophy primarily affecting the cnsl in myxedema1 mappingG13.8Systemic atrophy aff cnsl in oth diseases classd elswhr1 mappingG14Postpolio syndrome1 mapping
G20-G26: Extrapyramidal and Movement Disorders
36 codes with ICD-11 mappings
G20Parkinson's disease1 mappingG21Secondary parkinsonism1 mappingG21.0Malignant neuroleptic syndrome1 mappingG21.1Other drug-induced secondary parkinsonism1 mappingG21.2Secondary parkinsonism due to other external agents1 mappingG21.3Postencephalitic parkinsonism1 mappingG21.4Vascular parkinsonism1 mappingG21.8Other secondary parkinsonism1 mappingG21.9Secondary parkinsonism, unspecified1 mappingG23Other degenerative diseases of basal ganglia1 mappingG23.0Hallervorden-Spatz disease1 mappingG23.1Progressive supranuclear ophthalmoplegia1 mappingG23.2Striatonigral degeneration1 mappingG23.3Hypomyelination with atrophy of basal ganglia and cerebellum1 mappingG23.8Other specified degenerative diseases of basal ganglia1 mappingG23.9Degenerative disease of basal ganglia, unspecified1 mappingG24Dystonia1 mappingG24.0Drug induced dystonia1 mappingG24.1Genetic torsion dystonia1 mappingG24.2Idiopathic nonfamilial dystonia1 mappingG24.3Spasmodic torticollis1 mappingG24.4Idiopathic orofacial dystonia1 mappingG24.5Blepharospasm1 mappingG24.8Other dystonia1 mappingG24.9Dystonia, unspecified1 mappingG25Other extrapyramidal and movement disorders1 mappingG25.0Essential tremor1 mappingG25.1Drug-induced tremor1 mappingG25.2Other specified forms of tremor1 mappingG25.3Myoclonus1 mappingG25.4Drug-induced chorea1 mappingG25.5Other chorea1 mappingG25.6Drug induced tics and other tics of organic origin1 mappingG25.8Other specified extrapyramidal and movement disorders1 mappingG25.9Extrapyramidal and movement disorder, unspecified1 mappingG26Extrapyramidal and movement disord in diseases classd elswhr1 mapping
G30-G32: Other Degenerative Diseases of the Nervous System
14 codes with ICD-11 mappings
G30Alzheimer's disease1 mappingG30.0Alzheimer's disease with early onset1 mappingG30.1Alzheimer's disease with late onset1 mappingG30.8Other Alzheimer's disease1 mappingG30.9Alzheimer's disease, unspecified1 mappingG31Oth degenerative diseases of nervous system, NEC1 mappingG31.0Frontotemporal dementia1 mappingG31.1Senile degeneration of brain, not elsewhere classified1 mappingG31.2Degeneration of nervous system due to alcohol1 mappingG31.8Other specified degenerative diseases of nervous system1 mappingG31.9Degenerative disease of nervous system, unspecified1 mappingG32Oth degeneratv disord of nervous sys in dis classd elswhr1 mappingG32.0Subac comb degeneration of spinal cord in dis classd elswhr1 mappingG32.8Oth degeneratv disord of nervous sys in dis classd elswhr1 mapping
G35-G37: Demyelinating Diseases of the Central Nervous System
15 codes with ICD-11 mappings
G35Multiple sclerosis1 mappingG36Other acute disseminated demyelination1 mappingG36.0Neuromyelitis optica [Devic]1 mappingG36.1Acute and subacute hemorrhagic leukoencephalitis [Hurst]1 mappingG36.8Other specified acute disseminated demyelination1 mappingG36.9Acute disseminated demyelination, unspecified1 mappingG37Other demyelinating diseases of central nervous system1 mappingG37.0Diffuse sclerosis of central nervous system1 mappingG37.1Central demyelination of corpus callosum1 mappingG37.2Central pontine myelinolysis1 mappingG37.3Acute transverse myelitis in demyelinating disease of cnsl1 mappingG37.4Subacute necrotizing myelitis of central nervous system1 mappingG37.5Concentric sclerosis [Balo] of central nervous system1 mappingG37.8Oth demyelinating diseases of central nervous system1 mappingG37.9Demyelinating disease of central nervous system, unspecified1 mapping
G40-G47: Episodic and Paroxysmal Disorders
47 codes with ICD-11 mappings
G40Epilepsy and recurrent seizures1 mappingG40.0Local-rel (focal) idio epilepsy w seizures of loc onset1 mappingG40.1Local-rel (focal) symptc epilepsy w simple partial seizures1 mappingG40.2Local-rel (focal) symptc epilepsy w complex partial seizures1 mappingG40.3Generalized idiopathic epilepsy and epileptic syndromes1 mappingG40.4Other generalized epilepsy and epileptic syndromes1 mappingG40.5Epileptic seizures related to external causes1 mappingG40.8Other epilepsy and recurrent seizures1 mappingG40.9Epilepsy, unspecified1 mappingG43Migraine1 mappingG43.0Migraine without aura1 mappingG43.1Migraine with aura1 mappingG43.8Other migraine1 mappingG43.9Migraine, unspecified1 mappingG44Other headache syndromes1 mappingG44.0Cluster headaches and oth trigeminal autonm cephalgias (TAC)1 mappingG44.1Vascular headache, not elsewhere classified1 mappingG44.2Tension-type headache1 mappingG44.3Post-traumatic headache1 mappingG44.4Drug-induced headache, not elsewhere classified1 mappingG44.8Other specified headache syndromes1 mappingG45Transient cerebral ischemic attacks and related syndromes1 mappingG45.0Vertebro-basilar artery syndrome1 mappingG45.1Carotid artery syndrome (hemispheric)1 mappingG45.2Multiple and bilateral precerebral artery syndromes1 mappingG45.3Amaurosis fugax1 mappingG45.4Transient global amnesia1 mappingG45.8Oth transient cerebral ischemic attacks and related synd1 mappingG45.9Transient cerebral ischemic attack, unspecified1 mappingG46Vascular syndromes of brain in cerebrovascular diseases1 mappingG46.0Middle cerebral artery syndrome1 mappingG46.1Anterior cerebral artery syndrome1 mappingG46.2Posterior cerebral artery syndrome1 mappingG46.3Brain stem stroke syndrome1 mappingG46.4Cerebellar stroke syndrome1 mappingG46.5Pure motor lacunar syndrome1 mappingG46.6Pure sensory lacunar syndrome1 mappingG46.7Other lacunar syndromes1 mappingG46.8Oth vascular syndromes of brain in cerebrovascular diseases1 mappingG47Sleep disorders1 mappingG47.0Insomnia1 mappingG47.1Hypersomnia1 mappingG47.2Circadian rhythm sleep disorders1 mappingG47.3Sleep apnea1 mappingG47.4Narcolepsy and cataplexy1 mappingG47.8Other sleep disorders1 mappingG47.9Sleep disorder, unspecified1 mapping
G50-G59: Nerve, Nerve Root and Plexus Disorders
57 codes with ICD-11 mappings
G50Disorders of trigeminal nerve1 mappingG50.0Trigeminal neuralgia1 mappingG50.1Atypical facial pain1 mappingG50.8Other disorders of trigeminal nerve1 mappingG50.9Disorder of trigeminal nerve, unspecified1 mappingG51Facial nerve disorders1 mappingG51.0Bell's palsy1 mappingG51.1Geniculate ganglionitis1 mappingG51.2Melkersson's syndrome1 mappingG51.3Clonic hemifacial spasm1 mappingG51.4Facial myokymia1 mappingG51.8Other disorders of facial nerve1 mappingG51.9Disorder of facial nerve, unspecified1 mappingG52Disorders of other cranial nerves1 mappingG52.0Disorders of olfactory nerve1 mappingG52.1Disorders of glossopharyngeal nerve1 mappingG52.2Disorders of vagus nerve1 mappingG52.3Disorders of hypoglossal nerve1 mappingG52.7Disorders of multiple cranial nerves1 mappingG52.8Disorders of other specified cranial nerves1 mappingG52.9Cranial nerve disorder, unspecified1 mappingG53Cranial nerve disorders in diseases classified elsewhere1 mappingG54Nerve root and plexus disorders1 mappingG54.0Brachial plexus disorders1 mappingG54.1Lumbosacral plexus disorders1 mappingG54.2Cervical root disorders, not elsewhere classified1 mappingG54.3Thoracic root disorders, not elsewhere classified1 mappingG54.4Lumbosacral root disorders, not elsewhere classified1 mappingG54.5Neuralgic amyotrophy1 mappingG54.6Phantom limb syndrome with pain1 mappingG54.7Phantom limb syndrome without pain1 mappingG54.8Other nerve root and plexus disorders1 mappingG54.9Nerve root and plexus disorder, unspecified1 mappingG55Nerve root and plexus compressions in diseases classd elswhr1 mappingG56Mononeuropathies of upper limb1 mappingG56.0Carpal tunnel syndrome1 mappingG56.1Other lesions of median nerve1 mappingG56.2Lesion of ulnar nerve1 mappingG56.3Lesion of radial nerve1 mappingG56.8Other specified mononeuropathies of upper limb1 mappingG56.9Unspecified mononeuropathy of upper limb1 mappingG57Mononeuropathies of lower limb1 mappingG57.0Lesion of sciatic nerve1 mappingG57.1Meralgia paresthetica1 mappingG57.2Lesion of femoral nerve1 mappingG57.3Lesion of lateral popliteal nerve1 mappingG57.4Lesion of medial popliteal nerve1 mappingG57.5Tarsal tunnel syndrome1 mappingG57.6Lesion of plantar nerve1 mappingG57.8Other specified mononeuropathies of lower limb1 mappingG57.9Unspecified mononeuropathy of lower limb1 mappingG58Other mononeuropathies1 mappingG58.0Intercostal neuropathy1 mappingG58.7Mononeuritis multiplex1 mappingG58.8Other specified mononeuropathies1 mappingG58.9Mononeuropathy, unspecified1 mappingG59Mononeuropathy in diseases classified elsewhere1 mapping
G60-G65: Polyneuropathies and Other Disorders of the Peripheral Nervous System
20 codes with ICD-11 mappings
G60Hereditary and idiopathic neuropathy1 mappingG60.0Hereditary motor and sensory neuropathy1 mappingG60.1Refsum's disease1 mappingG60.2Neuropathy in association with hereditary ataxia1 mappingG60.3Idiopathic progressive neuropathy1 mappingG60.8Other hereditary and idiopathic neuropathies1 mappingG60.9Hereditary and idiopathic neuropathy, unspecified1 mappingG61Inflammatory polyneuropathy1 mappingG61.0Guillain-Barre syndrome1 mappingG61.1Serum neuropathy1 mappingG61.8Other inflammatory polyneuropathies1 mappingG61.9Inflammatory polyneuropathy, unspecified1 mappingG62Other and unspecified polyneuropathies1 mappingG62.0Drug-induced polyneuropathy1 mappingG62.1Alcoholic polyneuropathy1 mappingG62.2Polyneuropathy due to other toxic agents1 mappingG62.8Other specified polyneuropathies1 mappingG62.9Polyneuropathy, unspecified1 mappingG63Polyneuropathy in diseases classified elsewhere1 mappingG64Other disorders of peripheral nervous system1 mapping
G70-G73: Diseases of Myoneural Junction and Muscle
25 codes with ICD-11 mappings
G70Myasthenia gravis and other myoneural disorders1 mappingG70.0Myasthenia gravis1 mappingG70.1Toxic myoneural disorders1 mappingG70.2Congenital and developmental myasthenia1 mappingG70.8Other specified myoneural disorders1 mappingG70.9Myoneural disorder, unspecified1 mappingG71Primary disorders of muscles1 mappingG71.0Muscular dystrophy1 mappingG71.1Myotonic disorders1 mappingG71.2Congenital myopathies1 mappingG71.3Mitochondrial myopathy, not elsewhere classified1 mappingG71.8Other primary disorders of muscles1 mappingG71.9Primary disorder of muscle, unspecified1 mappingG72Other and unspecified myopathies1 mappingG72.0Drug-induced myopathy1 mappingG72.1Alcoholic myopathy1 mappingG72.2Myopathy due to other toxic agents1 mappingG72.3Periodic paralysis1 mappingG72.4Inflammatory and immune myopathies, not elsewhere classified1 mappingG72.8Other specified myopathies1 mappingG72.9Myopathy, unspecified1 mappingG73Disord of myoneural junction and muscle in dis classd elswhr1 mappingG73.1Lambert-Eaton syndrome in neoplastic disease1 mappingG73.3Myasthenic syndromes in other diseases classified elsewhere1 mappingG73.7Myopathy in diseases classified elsewhere1 mapping
G80-G83: Cerebral Palsy and Other Paralytic Syndromes
24 codes with ICD-11 mappings
G80Cerebral palsy1 mappingG80.0Spastic quadriplegic cerebral palsy1 mappingG80.1Spastic diplegic cerebral palsy1 mappingG80.2Spastic hemiplegic cerebral palsy1 mappingG80.3Athetoid cerebral palsy1 mappingG80.4Ataxic cerebral palsy1 mappingG80.8Other cerebral palsy1 mappingG80.9Cerebral palsy, unspecified1 mappingG81Hemiplegia and hemiparesis1 mappingG81.0Flaccid hemiplegia1 mappingG81.1Spastic hemiplegia1 mappingG81.9Hemiplegia, unspecified1 mappingG82Paraplegia (paraparesis) and quadriplegia (quadriparesis)1 mappingG82.2Paraplegia1 mappingG82.5Quadriplegia1 mappingG83Other paralytic syndromes1 mappingG83.0Diplegia of upper limbs1 mappingG83.1Monoplegia of lower limb1 mappingG83.2Monoplegia of upper limb1 mappingG83.3Monoplegia, unspecified1 mappingG83.4Cauda equina syndrome1 mappingG83.5Locked-in state1 mappingG83.8Other specified paralytic syndromes1 mappingG83.9Paralytic syndrome, unspecified1 mapping
G89-G99: Other Disorders of the Nervous System
49 codes with ICD-11 mappings
G90Disorders of autonomic nervous system1 mappingG90.0Idiopathic peripheral autonomic neuropathy1 mappingG90.1Familial dysautonomia [Riley-Day]1 mappingG90.2Horner's syndrome1 mappingG90.4Autonomic dysreflexia1 mappingG90.5Complex regional pain syndrome I (CRPS I)1 mappingG90.8Other disorders of autonomic nervous system1 mappingG90.9Disorder of the autonomic nervous system, unspecified1 mappingG91Hydrocephalus1 mappingG91.0Communicating hydrocephalus1 mappingG91.1Obstructive hydrocephalus1 mappingG91.2(Idiopathic) normal pressure hydrocephalus1 mappingG91.3Post-traumatic hydrocephalus, unspecified1 mappingG91.8Other hydrocephalus1 mappingG91.9Hydrocephalus, unspecified1 mappingG92Toxic encephalopathy1 mappingG93Other disorders of brain1 mappingG93.0Cerebral cysts1 mappingG93.1Anoxic brain damage, not elsewhere classified1 mappingG93.2Benign intracranial hypertension1 mappingG93.3Postviral and related fatigue syndromes1 mappingG93.4Other and unspecified encephalopathy1 mappingG93.5Compression of brain1 mappingG93.6Cerebral edema1 mappingG93.7Reye's syndrome1 mappingG93.8Other specified disorders of brain1 mappingG93.9Disorder of brain, unspecified1 mappingG94Other disorders of brain in diseases classified elsewhere1 mappingG95Other and unspecified diseases of spinal cord1 mappingG95.0Syringomyelia and syringobulbia1 mappingG95.1Vascular myelopathies1 mappingG95.2Other and unspecified cord compression1 mappingG95.8Other specified diseases of spinal cord1 mappingG95.9Disease of spinal cord, unspecified1 mappingG96Other disorders of central nervous system1 mappingG96.0Cerebrospinal fluid leak1 mappingG96.1Disorders of meninges, not elsewhere classified1 mappingG96.8Other specified disorders of central nervous system1 mappingG96.9Disorder of central nervous system, unspecified1 mappingG97Intraop and postproc comp and disorders of nervous sys, NEC1 mappingG97.0Cerebrospinal fluid leak from spinal puncture1 mappingG97.1Other reaction to spinal and lumbar puncture1 mappingG97.2Intracranial hypotension following ventricular shunting1 mappingG97.8Oth intraop and postproc comp and disorders of nervous sys1 mappingG98Other disorders of nervous system not elsewhere classified1 mappingG99Oth disorders of nervous system in diseases classd elswhr1 mappingG99.0Autonomic neuropathy in diseases classified elsewhere1 mappingG99.2Myelopathy in diseases classified elsewhere1 mappingG99.8Oth disrd of nervous system in diseases classified elsewhere1 mapping