[Reference tables of WHO Chapter V (F) of the 10th revision of the International Classification of Diseases (ICD-10): ICD-10 vs. ICD-9].

The introduction of ICD-10, Chapter V (F) will have the consequence of a changed diagnostic spectrum and a revision of several diagnostic terms including a differentiation of several diagnostic categories. Several diagnostic categories of ICD-10 have no corresponding terms in ICD-9. Conversely, many diagnostic categories in ICD-9 are covered by several diagnostic categories in ICD-10 following phenomenological aspects as an organizing principle. Against this background the Department of Mental Health of the World Health Organization developed crosswalks between the two systems. The WHO-Crosswalks, which were translated and adapted for the conditions in German-speaking countries by the authors, will provide a help concerning the classification of ICD-9 categories within ICD-10. Each diagnostic category of ICD-9 is compared with the corresponding categories in ICD-10 including a critical comment in the text.