Oklahoma Cancer Specialists and Research Institute offers the region’s most comprehensive cancer care. We are a physician-owned group practice with more than 20 blood and cancer specialty physicians, and 200 nurses and associates. Oklahoma Cancer Specialists and Research Institute launched in 2016, uniting St. John Health System and Tulsa Cancer Institute. As a certified member of MD Anderson Cancer Network®, we are dedicated to the mission of eliminating cancer and upholding the highest standards of quality care.