Chapter 8: Diseases of the Nervous System
ICD-11 to ICD-10 crosswalk mappings for codes 8A00-8E7Z
237 ICD-11 codes in this chapter have ICD-10 crosswalk mappings from the WHO.
Includes epilepsy, migraine, Parkinson's disease, Alzheimer's disease, multiple sclerosis, neuropathies, and cerebrovascular diseases. ICD-11 moves sleep disorders to their own chapter and improves classification of pain conditions and neurodegenerative diseases.
Browse Other Chapters
8A00-8A0Z: Movement disorders
28 codes with ICD-10 mappings
8A00.0ZParkinson disease, unspecified1 mapping8A00.10Progressive supranuclear palsy1 mapping8A00.1YOther specified atypical parkinsonism3 mappings8A00.23Vascular parkinsonism1 mapping8A00.24Drug-induced parkinsonism1 mapping8A00.2YOther specified secondary parkinsonism1 mapping8A00.2ZSecondary parkinsonism, unspecified5 mappings8A01.10Huntington disease1 mapping8A01.ZChoreiform disorders, unspecified1 mapping8A02.00Benign essential blepharospasm1 mapping8A02.0YOther specified primary dystonia1 mapping8A02.0ZPrimary dystonia, unspecified3 mappings8A02.10Drug-induced dystonia1 mapping8A02.ZDystonic disorders, unspecified3 mappings8A03.0Congenital ataxia1 mapping8A03.15Ataxia due to mitochondrial mutations1 mapping8A03.1ZHereditary ataxia, unspecified1 mapping8A03.ZAtaxic disorders, unspecified5 mappings8A04.1Essential tremor or related tremors1 mapping8A04.31Tremor due to chronic or acute substance use1 mapping8A04.YOther specified disorders associated with tremor1 mapping8A04.ZDisorders associated with tremor, unspecified1 mapping8A05.00Tourette syndrome1 mapping8A05.0ZPrimary tics or tic disorders, unspecified1 mapping8A05.ZTic disorders, unspecified5 mappings8A06.ZMyoclonic disorders, unspecified1 mapping8A0YOther specified movement disorders1 mapping8A0ZMovement disorders, unspecified6 mappings
8A20-8A2Z: Disorders with neurocognitive impairment as a major feature
2 codes with ICD-10 mappings
8A40-8A4Z: Multiple sclerosis or other white matter disorders
13 codes with ICD-10 mappings
8A40.YOther specified multiple sclerosis2 mappings8A40.ZMultiple sclerosis, unspecified1 mapping8A41.0Transverse myelitis1 mapping8A42.0Acute haemorrhagic leukoencephalitis1 mapping8A42.ZAcute disseminated encephalomyelitis, unspecified1 mapping8A43.ZNeuromyelitis optica, unspecified1 mapping8A45.00Human T-cell lymphotropic virus-associated myelopathy1 mapping8A45.01Subacute sclerosing panencephalitis1 mapping8A45.02Progressive multifocal leukoencephalopathy1 mapping8A45.21Subacute necrotising myelitis1 mapping8A45.31Central pontine myelinolysis1 mapping8A46Central demyelination of corpus callosum1 mapping8A4ZMultiple sclerosis or other white matter disorders, unspecified7 mappings
8A60-8A6Z: Epilepsy or seizures
12 codes with ICD-10 mappings
8A60.ZEpilepsy due to unspecified structural or metabolic condition or disease1 mapping8A61.4ZGenetic epileptic syndromes with variable age of onset, unspecified1 mapping8A61.ZGenetic or presumed genetic syndromes primarily expressed as epilepsy, unspecified2 mappings8A62.2Acquired epileptic aphasia1 mapping8A63.0ZFebrile seizures, unspecified1 mapping8A66.0Convulsive status epilepticus1 mapping8A66.1ZNon-convulsive status epilepticus, unspecified1 mapping8A66.ZStatus epilepticus, unspecified3 mappings8A67Acute repetitive seizures1 mapping8A68.4Generalised tonic-clonic seizure1 mapping8A68.ZType of seizure, unspecified2 mappings8A6ZEpilepsy or seizures, unspecified6 mappings
8A80-8A8Z: Headache disorders
12 codes with ICD-10 mappings
8A80.0Migraine without aura1 mapping8A80.1ZMigraine with aura, unspecified2 mappings8A80.30Status migrainosus1 mapping8A80.3ZComplications related to migraine, unspecified1 mapping8A80.ZMigraine, unspecified2 mappings8A81.0Infrequent episodic tension-type headache1 mapping8A81.ZTension-type headache, unspecified2 mappings8A83Other primary headache disorder1 mapping8A84.YOther specified secondary headache3 mappings8A84.ZSecondary headache, unspecified1 mapping8A85Painful cranial neuropathies or other facial pains1 mapping8A8ZHeadache disorders, unspecified1 mapping
8B00-8B0Z: Intracranial haemorrhage
12 codes with ICD-10 mappings
8B00.0Deep hemispheric haemorrhage1 mapping8B00.1Lobar haemorrhage1 mapping8B00.2Brainstem haemorrhage1 mapping8B00.3Cerebellar haemorrhage1 mapping8B00.4Intraventricular haemorrhage without parenchymal haemorrhage1 mapping8B00.5Haemorrhage of multiple sites1 mapping8B00.ZIntracerebral haemorrhage, site unspecified4 mappings8B01.0Aneurysmal subarachnoid haemorrhage8 mappings8B01.2Subarachnoid haemorrhage not known if aneurysmal or non-aneurysmal3 mappings8B02Nontraumatic subdural haemorrhage1 mapping8B03Nontraumatic epidural haemorrhage1 mapping8B0ZIntracranial haemorrhage, unspecified2 mappings
8B00-8B2Z: Cerebrovascular diseases
36 codes with ICD-10 mappings
8B10.0Amaurosis fugax1 mapping8B10.YOther specified transient ischaemic attack2 mappings8B10.ZTransient ischaemic attack, unspecified3 mappings8B11.0Cerebral ischaemic stroke due to extracranial large artery atherosclerosis1 mapping8B11.1Cerebral ischaemic stroke due to intracranial large artery atherosclerosis1 mapping8B11.2ZCerebral ischaemic stroke due to embolic occlusion, unspecified2 mappings8B11.3Cerebral ischaemic stroke due to small artery occlusion4 mappings8B11.50Cerebral ischaemic stroke due to unspecified occlusion or stenosis of extracranial large artery1 mapping8B11.51Cerebral ischaemic stroke due to unspecified occlusion or stenosis of intracranial large artery1 mapping8B20Stroke not known if ischaemic or haemorrhagic1 mapping8B22.0Dissection of cerebral arteries1 mapping8B22.1Cerebral venous thrombosis1 mapping8B22.40Arteriovenous malformation of cerebral vessels1 mapping8B22.5Cerebral aneurysm, nonruptured1 mapping8B22.7YOther specified cerebral arteritis, not elsewhere classified1 mapping8B22.8Hypertensive encephalopathy1 mapping8B22.BMoyamoya syndrome1 mapping8B22.YOther specified cerebrovascular disease5 mappings8B23Cerebrovascular abnormalities4 mappings8B24.ZHypoxic-ischaemic encephalopathy, unspecified1 mapping8B25.0Late effects of cerebral ischemic stroke1 mapping8B25.1Late effects of intracerebral haemorrhage1 mapping8B25.2Late effects of subarachnoid haemorrhage1 mapping8B25.3Late effects of other nontraumatic intracranial haemorrhage1 mapping8B25.4Late effects of stroke not known if ischaemic or haemorrhagic1 mapping8B25.ZLate effects of cerebrovascular disease, unspecified2 mappings8B26.0Brainstem stroke syndrome1 mapping8B26.1Cerebellar stroke syndrome1 mapping8B26.2Middle cerebral artery syndrome1 mapping8B26.3Anterior cerebral artery syndrome1 mapping8B26.4Posterior cerebral artery syndrome1 mapping8B26.50Pure motor lacunar syndrome1 mapping8B26.51Pure sensory lacunar syndrome1 mapping8B26.5ZLacunar syndromes, unspecified1 mapping8B26.ZVascular syndromes of brain in cerebrovascular diseases, unspecified2 mappings8B2ZCerebrovascular diseases, unspecified6 mappings
8B40-8B4Z: Spinal cord disorders excluding trauma
6 codes with ICD-10 mappings
8B40Cauda equina syndrome1 mapping8B42Myelopathy4 mappings8B44.0ZHereditary spastic paraplegia, unspecified1 mapping8B44.YOther specified degenerative myelopathic disorders1 mapping8B44.ZDegenerative myelopathic disorders, unspecified2 mappings8B4ZSpinal cord disorders excluding trauma, unspecified1 mapping
8B60-8B6Z: Motor neuron diseases or related disorders
4 codes with ICD-10 mappings
8B80-8B8Z: Disorders of cranial nerves
14 codes with ICD-10 mappings
8B80Disorders of olfactory nerve1 mapping8B82.0Trigeminal neuralgia1 mapping8B82.ZDisorders of trigeminal nerve, unspecified3 mappings8B84Disorders of hypoglossal nerve1 mapping8B85Disorders of multiple cranial nerves1 mapping8B86Disorders of vagus nerve1 mapping8B87Disorders of glossopharyngeal nerve1 mapping8B88.0Bell palsy1 mapping8B88.1Facial myokymia1 mapping8B88.2Hemifacial spasm1 mapping8B88.YOther specified disorders of facial nerve2 mappings8B88.ZDisorders of facial nerve, unspecified4 mappings8B8YOther specified disorders of cranial nerves2 mappings8B8ZDisorders of cranial nerves, unspecified3 mappings
8B80-8C4Z: Disorders of nerve root, plexus or peripheral nerves
36 codes with ICD-10 mappings
8B90Nerve root or plexus compressions6 mappings8B91.0Neuralgic shoulder amyotrophy1 mapping8B91.ZBrachial plexus disorders, unspecified1 mapping8B92.ZLumbosacral plexus disorders, unspecified1 mapping8B93.ZRadiculopathy, unspecified2 mappings8B9ZNerve root or plexus disorders, unspecified6 mappings8C00Idiopathic progressive neuropathy1 mapping8C01.0Acute inflammatory demyelinating polyneuropathy1 mapping8C01.ZInflammatory polyneuropathy, unspecified4 mappings8C03.0Diabetic polyneuropathy1 mapping8C03.1Polyneuropathy due to infectious diseases1 mapping8C03.2Polyneuropathy in neoplastic disease1 mapping8C03.3Polyneuropathy in nutritional deficiency1 mapping8C03.4Polyneuropathy in systemic connective tissue disorders1 mapping8C03.ZOther secondary polyneuropathy, unspecified4 mappings8C0YOther specified polyneuropathy2 mappings8C10.0Carpal tunnel syndrome1 mapping8C10.1Lesion of ulnar nerve1 mapping8C10.2Lesion of radial nerve1 mapping8C10.YOther specified mononeuropathies of upper limb2 mappings8C10.ZMononeuropathies of upper limb, unspecified2 mappings8C11.0ZLesion of sciatic nerve, unspecified1 mapping8C11.1Meralgia paraesthetica1 mapping8C11.2Lesion of femoral nerve1 mapping8C11.3Lesion of common peroneal nerve1 mapping8C11.4Lesion of tibial nerve1 mapping8C11.5Tarsal tunnel syndrome1 mapping8C11.6Lesion of plantar nerve1 mapping8C11.ZMononeuropathies of lower limb, unspecified3 mappings8C12.0Intercostal neuropathy1 mapping8C12.1Mononeuritis multiplex1 mapping8C12.YMononeuropathy of other specified nerve4 mappings8C1ZMononeuropathy of unspecified site2 mappings8C20.ZHereditary motor and sensory neuropathy, unspecified1 mapping8C21.1Hereditary sensory and autonomic neuropathy type III1 mapping8C4ZDisorders of nerve root, plexus or peripheral nerves, unspecified7 mappings
8C60-8C6Z: Myasthenia gravis or certain specified neuromuscular junction disorders
5 codes with ICD-10 mappings
8C60-8D0Z: Diseases of neuromuscular junction or muscle
10 codes with ICD-10 mappings
8C70.ZMuscular dystrophy, unspecified1 mapping8C71.ZMyotonic disorders, unspecified1 mapping8C72.ZCongenital myopathies, unspecified1 mapping8C73.ZMitochondrial myopathies, unspecified1 mapping8C74.1ZPeriodic paralysis, unspecified1 mapping8C7ZPrimary disorders of muscles, unspecified3 mappings8C80Drug-induced myopathy1 mapping8C8YOther specified secondary myopathies1 mapping8C8ZSecondary myopathies, unspecified2 mappings8D0ZDiseases of neuromuscular junction or muscle, unspecified8 mappings
8D20-8D2Z: Cerebral palsy
6 codes with ICD-10 mappings
8D40-8D4Z: Nutritional or toxic disorders of the nervous system
7 codes with ICD-10 mappings
8D40.ZNeurological disorders due to nutrient deficiency, unspecified1 mapping8D43.0ZEncephalopathy due to toxicity, unspecified1 mapping8D43.20Drug-induced polyneuropathy1 mapping8D43.2YOther specified neuropathy due to toxicity1 mapping8D44.0Alcoholic polyneuropathy1 mapping8D44.1Alcoholic myopathy1 mapping8D44.ZAlcohol-related neurological disorders, unspecified1 mapping
8D60-8D6Z: Disorders of cerebrospinal fluid pressure or flow
11 codes with ICD-10 mappings
8D60.1Cerebral oedema1 mapping8D60.ZIncreased intracranial pressure, unspecified1 mapping8D64.02Post haemorrhagic hydrocephalus1 mapping8D64.04Normal-pressure hydrocephalus1 mapping8D64.0YOther specified communicating hydrocephalus1 mapping8D64.0ZCommunicating hydrocephalus, unspecified1 mapping8D64.1ZNon-communicating hydrocephalus, unspecified1 mapping8D64.ZHydrocephalus, unspecified4 mappings8D65Cerebrospinal fluid fistula2 mappings8D66.ZSyringomyelia or syringobulbia, unspecified1 mapping8D68Porencephalic cyst1 mapping
8D80-8D8Z: Disorders of autonomic nervous system
8 codes with ICD-10 mappings
8D87.00Multiple system atrophy, Cerebellar type1 mapping8D87.01Multiple system atrophy, Parkinsonism1 mapping8D87.0YOther specified multiple system atrophy4 mappings8D88.4Autonomic neuropathy in endocrine and metabolic diseases1 mapping8D88.YOther specified autonomic neuropathies1 mapping8D8A.1Horner syndrome1 mapping8D8CAutonomic dysreflexia1 mapping8D8ZDisorders of autonomic nervous system, unspecified2 mappings
8E00-8E0Z: Human prion diseases
1 code with ICD-10 mappings
8E20-8E2Z: Disorders of consciousness
1 code with ICD-10 mappings
8E40-8E4A: Certain disorders of the nervous system
8 codes with ICD-10 mappings
8E40.ZDisorders of the meninges excluding infection, unspecified5 mappings8E43.00Phantom limb syndrome2 mappings8E45Locked-in syndrome1 mapping8E46Reye syndrome1 mapping8E47Encephalopathy, not elsewhere classified9 mappings8E49Postviral fatigue syndrome1 mapping8E4A.1Paraneoplastic or autoimmune disorders of the peripheral or autonomic nervous system2 mappings8E4A.ZParaneoplastic or autoimmune disorders of the nervous system, unspecified3 mappings
8E60-8E66: Postprocedural disorders of the nervous system
3 codes with ICD-10 mappings