In July 2006 the American Academy of Sleep (AASM) defined new requirements for the Fellow membership category, which are effective with the 2007 membership calendar year. All members with Fellow membership status before the new requirements were grandfathered in to the new Fellow category.

The AASM recently announced a new designation – FAASM – to signify status as a Fellow member. The AASM encourages all current members with Fellow status to use this designation to signify their professional achievement.