Even in this time of uncertainty, Mayo Clinic is a place for hope and healing — and we're committed to delivering the care you need. With options for face-to-face, virtual visits or phone appointments in adherence with federal and state executive orders and guidance. Tanios S. Bekaii-Saab, M.D., F.A.C.P., is a medical oncologist with a specific focus in gastrointestinal cancers at Mayo Clinic's campus in Phoenix, Arizona. Dr. Bekaii-Saab serves as the leader of the Gastrointestinal Cancer Program at the Mayo Clinic Cancer Center. Conditions treated include anal cancer, cancer of unknown origin, cholangiocarcinoma, colon cancer, esophageal cancer, gallbladder cancer, gastrointestinal stromal tumors, liver cancer, neuroendocrine carcinoma, pancreatic cancer, rectal cancer, small bowel cancer and stomach cancer. Other interests include gastrointestinal oncology, clinical trials, early cancer therapeutics and precision oncology. U.S. News & World Report consistently ranks Mayo Clinic among the top hospitals for cancer in the nation.