The Pearl Clinic specializes in Internal Medicine, Sleep Medicine and Nutrition. Internal Medicine is a specialty that deals with the prevention, diagnosis and treatment of adult diseases. Primary care physicians counsel and educate patients on safe health behaviors, self-care skills and treatment options, and provide screening tests and immunizations. Sleep Medicine is the medical subspecialty devoted to the diagnosis and treatment of sleep disturbances and disorders. Many sleep disorders present with similar symptoms such as excessive daytime sleepiness (EDS), which in the absence of sleep deprivation, can be caused by a treatable sleep disorder such as obstructive sleep apnea (OSA), narcolepsy, or circadian rhythm disturbances.