Mercy Regional Cancer Center Mount Shasta provides patients with radiation therapy for a variety and range of cancers and stages. From initial consultation through recovery, we treat the whole person, not a disease. Patients at our radiation oncology cancer clinic work with an integrated care team that keeps your primary care physicians and referring specialists informed about all care decisions. Our patients also benefit from the shared knowledge of over 750 physicians in our network, and the clinical research they conduct in the field of radiation oncology. Mercy Regional Cancer Center Mount Shasta is operated by 21st Century Oncology, a physician-led company headquartered in Fort Myers, Florida that operates over 180 radiation therapy cancer clinics across many U.S. states. Our radiation therapy clinic in Mount Shasta, California is located on Pine Street.