Originally published in March 2015, Version 4 of the PHE Defining adult neurological conditions International Classification of Diseases ICD10 code collection was published in April 2021. This collection of codes underpins the outputs produced by the National Dementia Intelligence team part of PHE Health Intelligence division.

Defining adult neurological conditions and dementia: ICD10 codes

19 condition groups included in collection

• Central nervous system infections; 
• Cranial nerve disorder;
• Dementia and Alzheimer’s disease;
• Development disorders;
• Epilepsy;
• Functional disorders;
• Headaches and migraine;
• Motor neurone disease and spinal muscular atrophy;
• Multiple sclerosis and inflammatory disorders;
• Ataxia;
• Neuromuscular diseases;
• Parkinsonism and other extrapyramidal disorders-tic disorder;
• Peripheral nerve disorders;
• Sleep disorders;
• Spondylotic myelopathy and radiculopathy;
• Neurovascular conditions;
• Traumatic brain and spine injury;
• Tumours of the nervous system;
• Rare and other neurological diseases 

Version 4 building on previous versions of the code collection

• expanding and renaming the stroke group to neurovascular conditions;
• adding the following codes to existing groups A521 to Central nervous system infections; F072 to Traumatic brain and spine injury; H481 to Cranial nerve disorder; H512 to Rare and other neurological diseases; M490 to Spondylotic myelopathy and radiculopathy; M612 to Neuromuscular diseases.

The code collection now includes 19 categories and 581 4-digit codes, reflecting ICD10 revisions and wider scope of work, now including dementia and neurovascular.

Originally published in March 2015

Containing over 470 ICD10 (2015) codes. For the purpose of the work of the neurology network, these codes were organised into 16 main condition groups and one additional "catch all" group.

Version 2 published in March 2016

Including 2 additional codes G50.0 and G50.1 to the cranial nerve disorder group. This revision also added metadata, addresses blanks in 'Category Sub-Group' column and added a column with ICD10 codes used in ‘deaths &births’ data.

Version 3 published in June 2020

Including 2 additional condition groups dementia & Alzheimer’s disease and stroke codes (groups 18 and 19) moving codes G310 and G318 from rare to dementia group;  expands sections 2 (cranial nerve disorder), 11 (Parkinsonism and other extrapyramidal disorders-tic disorder), 12 (peripheral nerve disorders), 15 (traumatic brain and spine injury) and 17 (Rare and other neurological diseases) to include newly identified codes from G23, G26, G52, G57, G58, G60, G61, G62, G83, G90 sections.

It also removed duplicate 3-digit codes column; introduces a fix code for deaths data in Parkinsonism group G200 which does not exist in ICD10 but appears in data (this was submitted for verification to Office for National Statistics (ONS)).