The AASM Manual for the Scoring of Sleep and Associated Events

The Definitive Sleep Scoring Resource

The AASM Manual for the Scoring of Sleep and Associated Events: Rules, Terminology and Technical Specifications is the definitive reference for the scoring of polysomnography (PSG) and home sleep apnea tests (HSATs). This comprehensive and evolving resource provides rules for scoring sleep stages, arousals, respiratory events during sleep, movements during sleep and cardiac events. The AASM Scoring Manual also provides guidance on standard montages, electrode placements and technical and digital specifications. This online publication is indispensable for sleep technologists and researchers, and it is an essential reference for physicians who interpret sleep studies.

Scoring Manual Version 3 (released February 2023)

  • Summary of Updates in Version 3 (February 2023)
  • Digital access to Version 3 was available starting February 15, 2023.
  • All AASM-accredited sleep facilities are required to have implemented the rules in Version 3 by December 31, 2023.

Scoring Manual 3 Access

Online (FREE for members; $70 nonmembers)

The AASM Scoring Manual is an online and app-based resource offering you digital access from your desktop, tablet and mobile device. Online access ensures that you always have immediate access to the current version of the manual, and it enables you to remain compliant with AASM accreditation standards.

The Scoring Manual is no longer offered as a subscription. Online access to the AASM Scoring Manual is free for active individual and facility members and available for purchase to nonmembers. AASM Accredited Facility Members may provide access for up to 10 staff members through their primary contact account.

AASM Scoring Manual 3 can be accessed by clicking on the “AASM Manual for the Scoring of Sleep and Associated Events” button on the My Benefits page when you login to your account on the AASM website or by using the AASM Resource Library app, which is a free download through the App Store and Google Play.

Print ($66.50 for members; $95 nonmembers)

Complement your online access with a print version of the AASM Scoring Manual or buy both as a bundle to take advantage of a discounted price.


Access to Scoring Manual 3 also includes access to an online resource of frequently asked questions about the AASM Scoring Manual with responses.

Please contact the AASM via email for any of the following questions about the Scoring Manual:

Summary of Updates

The following are summaries of the revisions made for each major update of the AASM Scoring Manual including the dates when these new versions were released.


The AASM is committed to ensuring that The AASM Manual for the Scoring of Sleep and Associated Events is accurate and reflects the best and most current evidence in sleep medicine. Any errors corrected in the online version of AASM Scoring Manual 3 can be viewed here, however, the uncorrected version may appear in some print copies.