This Breast Cancer Awareness Month, we are proud to announce that the OCSRI and Ascension St. John teams at the Ascension St. John Mary K. Chapman Comprehensive Breast Center have already treated more than 5,000 of patients with preventative and life-saving care since opening in July 2021. Remember, early detection is critical - to schedule a screening today, call (918) 744-5311.For Patients‧Our Team‧Navigating Care Portal‧Careers‧Contact Us‧About.