Psychiatr Pol
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In June 2018, WHO published the 11th edition of the International Classification of Diseases (ICD). The new edition introduced numerous changes. One of the most important was to rebuild the coding system and adapt ICD to digital use. ⋯ Taking into account the modern epidemiology and knowledge about the etiology of mental disorders, some categories have been removed from ICD. Moreover, several nonexistent categories have been added. The article summarizes and discusses the most important changes in ICD with the introduction of ICD-11, both in the coding system and in individual subchapters covering mental health issues.