The Anxiety and Related Disorders Interview Schedule for DSM-5: Lifetime Version (ADIS-5L) is a structured interview designed to diagnose current and past anxiety, mood, obsessive-compulsive, trauma, and related disorders (e.g., somatic symptom, substance use) and to permit differential diagnosis among these disorders according to DSM-5 criteria (American Psychiatric Association, 2013). In most diagnostic sections, the ADIS-5L also provides: (a) dimensional assessment of the key and associated features of disorders; and (b) inquiry to foster the functional analysis of the various disorders (e.g., nature of situations avoided, content of fear cognitions). The ADIS-5L contains screening questions for a variety of other conditions including hoarding disorder, impulse control disorders, eating disorders, attention deficit disorder, dissociative disorders, and psychotic disorders. Other sections of the ADIS-5L include the assessment of episodic and ongoing life stress, medical and psychiatric treatment history, and familial psychiatric history. The ADIS-5L also contains a Diagnostic Timeline to assist in the determination of the onset, remission, and temporal sequence of current and past disorders.