Learn more about our top-ranked specialties. We make it easy for patients around the world to get care from Mayo Clinic. Learn more about Mayo Clinic locations or choose a specific location. We solve the world's most serious and complex medical challenges. Fuel groundbreaking medical research! Mayo Clinic has the most robust laboratory and pathology practice for cancer care in the world, offering testing that spans diagnostic, theranostic, and prognostic approaches. At Mayo Clinic, you are a colleague of some of the most talented, experienced physicians in the world. You work with patients, conditions, and cases that most doctors will never encounter in their professional lives. Mayonnaise, [1] colloquially referred to as mayo , [2] is a thick, creamy sauce with a rich and tangy taste that is commonly used on sandwiches, hamburgers, bound salads, and French fries. Mayo Clinic (/ ˈmeɪoʊ / MAY-oh) is a private American academic medical center focused on integrated healthcare, education, and research. [4] It maintains three major campuses, in Rochester, Minnesota; Jacksonville, Florida; and Phoenix / Scottsdale, Arizona. Explore comprehensive guides on hundreds of common and rare diseases and conditions from the experts at Mayo Clinic. Learn how to make your own quick and easy mayo with ingredients you likely have on hand. View our specialty testing areas, which cover the full range of clinical specialties and include the latest diagnostic innovations for rare and complex disease states. Search for test updates. Access your Mayo Clinic patient portal for managing appointments, viewing test results, and communicating with your healthcare team securely online. Refill Mayo Clinic prescriptions at select Mayo Clinic pharmacies. Share Mayo Clinic health information with a non-Mayo Clinic app. Need help? If you need support for the patient portal or Mayo Clinic app, visit the Mayo Clinic Patient Portal Assistance page or call us at 1-877-858-0398.