The International Classification of Sleep Disorders (ICSD) is the premiere clinical text for the diagnosis of sleep disorders. Released in June 2023, this text revision was based on an extensive review of the current literature and features new and updated information in the text of each chapter, minor corrections, and some criteria changes. Sleep disorders are grouped into six major categories in the ICSD-3-TR:

• Insomnia Disorders
• Sleep-Related Breathing Disorders
• Central Disorders of Hypersomnolence
• Circadian Rhythm Sleep-Wake Disorders
• Parasomnias
• Sleep-Related Movement Disorders

In addition, there is information about sleep-related medical and neurological disorders and ICD-10 and ICD-11 diagnosis codes in the appendices. ICSD-3-TR is an essential reference for all clinicians and researchers for accurately diagnosing sleep disorders.