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Classification of sleep disorders

Brooke G Judd, MD
Michael J Sateia, MD
Section Editor
Susan M Harding, MD, FCCP, AGAF
Deputy Editor
April F Eichler, MD, MPH


Diagnostic classification of sleep disorders is important because it standardizes definitions, improves awareness of the conditions, promotes a broad differential diagnosis, and facilitates a systematic diagnostic approach.

The International Classification of Sleep Disorders (ICSD) is the most widely used classification system for sleep disorders. The third edition of the ICSD (ICSD-3) includes seven major categories of sleep disorders [1]:


Sleep-related breathing disorders

Central disorders of hypersomnolence


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Literature review current through: Sep 2016. | This topic last updated: May 6, 2015.
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  1. American Academy of Sleep Medicine. International Classification of Sleep Disorders, 3rd ed, American Academy of Sleep Medicine, Darien, IL 2014.
  2. Sateia MJ. International classification of sleep disorders-third edition: highlights and modifications. Chest 2014; 146:1387.
  3. Berry RB, Brooks R, Gamaldo CE, et al for the American Academy of Sleep Medicine. The AASM Manual for the Scoring of Sleep and Associated Events: Rules, Terminology and Technical Specifications, Version 2.2, www.aasmnet.org, American Academy of Sleep Medicine, Darien, IL 2015.
  4. American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5), American Psychiatric Association, Arlington, VA 2013.