The Diagnostic and Statistical Manual of Mental Disorders 5 (DSM-5) "anxiety, obsessive-compulsive spectrum, posttraumatic, and dissociative disorders" work group addressed reconceptualization issues regarding all anxiety-related disorders. Based on systematic literature reviews, reanalyses of available data and evaluation of results following the DSM-5 principles it was decided to rearrange the disorder spectrum into separate groupings for the classical anxiety disorders, trauma- and stressor-related disorders, obsessive-compulsive and related disorders, and dissociative disorders. Among the classical anxiety disorders DSM-5 now also includes selective mutism and separation anxiety disorder. A major change from DSM-IV is a drastically simplified classification of panic disorder and agoraphobia. Both conditions can be separately coded in DSM-5 and the overlap is disclosed by a comorbid double diagnosis. The anxiety disorder criteria have been generally harmonized regarding content and order. It was assured that criteria are applicable to all age, gender and cultural groups. Furthermore, diagnosis-specific and cross-cutting dimensional anxiety scales have been developed to supplement categorical diagnosis which appears to facilitate assessment of severity and course of treatment.