WHO classification

The revision of the International Classification of Diseases (ICD) is a highly complicated process handled by experts in statistics at the WHO in Geneva. The influence of Neurological Societies onto the creation of a revision is through the accredited Societies which are for Neurology and Stroke the World Federation of Neurology (WFN) and the World Stroke Organisation (WSO). They are working within the Topic Advisory Group Neurology (TAGN) and can only make recommendations to the experts. April 2011 the TAGN advised to shift the section “Cerebrovascular diseases” covering all types of stroke from the “Diseases of the circulatory system” class (as it is in ICD-10) into the “Diseases of the nervous system” class (as it proposed in the draft ICD-11). This corresponds to a change of the statistical and legal placement of stroke from Internal Medicine to Neurology. This was then executed accordingly 5 years ago and stroke went under the neurological diseases (08) in the beta-version of the ICD-11. Neurologists all over the world agreed with this decision.