St. Mary's Medical Center Cancer Center is a cancer center that offers many services, including treatment and therapy services, cancer diagnosis and treatment, and breast cancer. Visit St. Mary's Medical Center Cancer Center located at 2250 Hayes St, San Francisco, CA. This San Francisco cancer center is one of the best in California. As part of the Dignity Health network, St. Mary's Medical Center Cancer Center is dedicated to delivering high quality, compassionate care and access to San Francisco and nearby communities.