Helene A. Emsellem, MD, FAASM
Medical Director

John R. Ruddy, MD
Linda C. Croom, ANPC
Annemarie Zabbara, PA-C
Sandy Evanson, PA-C







The Sleep Research Institute of The Center for Sleep & Wake Disorders

At The Center for Sleep & Wake Disorders, we believe that the exploration of innovative treatments and new medications for sleep disorders is essential to the growth of the field. Our participation in research studies keeps us on the forefront of sleep-related healthcare and allows us to offer our patients pioneering treatments for their disorders, if they wish to participate.  Our goal is to deliver individualized, comprehensive care for all aspects of disorders of sleep and wakefulness.

Areas of Study:



Shift Work Sleep Disorders

Circadian Rhythm Disorders

REM Sleep Behavioral Disorder

Obstructive Sleep Apnea

Periodic Limb Movements of Sleep

If you are interested in obtaining more information regarding participation in one of our ongoing research studies please contact our research staff at 301-654-5665 or e-mail

For general information about current national clinical trials you may go to Center Watch, a clinical trials listing service at:




5454 Wisconsin Ave.,
Suite 1725
Chevy Chase, MD 20815

Phone: 301-654-1575
Fax: 301-654-5658