TO BETTER SERVICE OUR PATIENTS, WE ARE SEEING PATIENTS BY APPOINTMENT ONLY. Having trouble sleeping? The experts at the SSM Health Sleep Center on the St. Clare Hospital campus in Fenton, Missouri, conduct sleep studies to diagnose and treat a variety of sleep disorders in adult patients, ages 18 and older. If your doctor has scheduled a sleep study, patients are encouraged to park outside the entrance of the St. Francis Building in Lot G and take the elevators to the third floor. Sleep studies are offered seven days a week, in the evening hours. Patients are asked to arrive promptly at 8:15 pm and will remain in the sleep lab until 5:30 am the following morning. We also offer daytime testing for shift workers.