Headquartered in Darien, IL, the American Academy of Sleep Medicine (AASM) is the only professional society dedicated exclusively to the medical subspecialty of sleep medicine. As the leading voice in the field of sleep medicine, the AASM sets standards and promotes excellence in health care, education and research. Established in 1975 as the Association of Sleep Disorders Centers, 10,000 physicians, researchers and health care professionals and 1,500 sleep centers are currently members of the American Academy of Sleep Medicine. Members specialize in studying, diagnosing and treating disorders of sleep and daytime alertness such as insomnia, narcolepsy and obstructive sleep apnea.