Orthopedics Department - Northridge Hospital Medical Center - Northridge offers many services, including hip care, joint replacement, and knee care. Visit Orthopedics Department - Northridge Hospital Medical Center - Northridge located at 18300 Roscoe Blvd, Northridge, CA. As part of the Dignity Health network, Orthopedics Department - Northridge Hospital Medical Center - Northridge is dedicated to delivering high quality, compassionate care and access to Northridge and nearby communities.