Avista Cypress Oncology Parker specializes in the care and treatment of cancer patients in a warm, inviting environment designed to nurture the mind, body and spirit. Our mission is to treat cancer patients with dignity and respect throughout their continuum of care. Located on the campus of Parker Adventist Hospital, we have access to the hospital's cancer center, which has the most advanced treatments, technologies and cancer therapies in a setting that is easy and welcoming for patients and their families.