Other specified dissociative disorder (OSDD) and Unspecified dissociative disorder (UDD) are two diagnostic categories for dissociative disorders (DDs) defined in the fifth edition (DSM-5) of the Diagnostic and Statistical Manual of Mental Disorders for individuals experiencing pathological dissociation that does not meet the full criteria for any specific dissociative disorder, such as dissociative identity disorder or depersonalization-derealization disorder. These two categories replaced the earlier Dissociative Disorder Not Otherwise Specified (DDNOS) used in the DSM-IV and DSM-IV-TR.