Personality disorder not otherwise specified (also known as personality disorder NOS or PDNOS) is a DSM-IV Axis II personality disorder
The DSM-5 does not have an equivalent to Personality Disorder NOS. However Personality disorder-trait specified (PD-TS) remains under consideration for future revisions. The DSM 5 “Unspecified Disorder” is not a personality disorder, it is used to enhance specificity of an existing disorder
or it is an emergency diagnosis unto itself (i.e. Unspecified Mental Disorder, 300.9), without being attached to another disorder