DescriptionObstructive sleep apnea refers to a functional airway obstruction during sleep which can result in lost productivity at work, daytime fatigue, and may even contribute to serious health complications such as congestive heart failure and stroke. Healthcare providers are not consistently screening patients in the outpatient setting for signs and symptoms of sleep apnea, but the value of the implementation of an evidence-based screening tool in the adult outpatient setting has also not been well established. A pre- and post-intervention analysis was performed using a convenience sample of patients visiting a federally-qualified primary care office in Newark, NJ. The study included English-speaking adults age 18-85 who have never had a sleep study and have not previously been diagnosed with sleep apnea. A comparison was then made between a sample of the same size seen in the week prior to the intervention using chart reviews to determine how many referrals were made in proportion to the total number of patients seen. The goal of the study was to determine if utilizing the STOP-Bang sleep apnea screening tool in this population would increase the number of referrals for advanced sleep apnea testing, which would be expected to decrease the prevalence of undiagnosed and untreated sleep apnea.