Sleep Center at Comprehensive is a full service sleep disorders center. We have four Board Certified Sleep Medicine doctors on staff as well as a highly trained staff of technicians. We specialize in patient care, focusing on the needs and concerns of the patient to provide the highest quality of service. Physicians include: John (Jack) Collier, MD, FCCP, DABSM, Sapna Bhatia, MD, Nisarg Changawala, MD, MPH,John (Jack) Collier, MD, FCCP, DABSM, James S. J. Hsu, MD, FCCP, DABSM, Ralph M. Nietrzeba, MD, FCCP, FACP, George S. Tu, MD, FCCP, DABSM and John J. Wojcik, MD, FCCP, DABSM.