Meet Our Medical Director Theodore J. Tomaszewski, M.D. is Medical Director of the Hip & Knee Orthopaedic Institute at Mercy Hospital. A graduate of the University of Scranton, Dr. Tomaszewski earned his medical degree from Georgetown University School of Medicine, Washington, DC. He is board certified in orthopaedic surgery and performs advanced surgical techniques, including minimally invasive hip & knee replacements. You'll receive your care from Dr. Tomaszewski and other highly skilled surgeons in Mercy's center designed especially for joint replacement patients.