Orthopaedic Institute of Southern Illinois (OISI) is a full-scale musculoskeletal medical practice based out of Southern Illinois. Service lines include: orthopaedics, spine/neurosurgery, interventional pain management, and surgical podiatry. Services include: MRI, CT, X-Ray, Physical Therapy, Occupational Therapy, DME, Walk-In Clinic, Osteoporosis Clinic, and Ambulatory Surgery Center (Southern Illinois Orthopedic Center).