Doctors Find a doctor whose last name begins with the letter A A Find a doctor whose last name begins with the letter B B Find a doctor whose last name begins with the letter C C Find a doctor whose last name begins with the letter D D Find a doctor whose last name begins with the letter E E Find a doctor whose last name begins with the letter F F Find a doctor whose last name begins with the letter G G Find a doctor whose last name begins with the letter H H Find a doctor whose last name begins with the letter I I Find a doctor whose last name begins with the letter J J Find a doctor whose last name begins with the letter K K Find a doctor whose last name begins with the letter L L Find a doctor whose last name begins with the letter M M Find a doctor whose last name begins with the letter N N Find a doctor whose last name begins with the letter O O Find a doctor whose last name begins with the letter P P There are no doctors whose last name begins with the letter Q Q active Find a doctor whose last name begins with the letter R R Find a doctor whose last name begins with the letter S S Find a doctor whose last name begins with the letter T T Find a doctor whose last name begins with the letter U U Find a doctor whose last name begins with the letter V V Find a doctor whose last name begins with the letter W W There are no doctors whose last name begins with the letter X X Find a doctor whose last name begins with the letter Y Y Find a doctor whose last name begins with the letter Z Z View All By Location: View All Rochester, MN Jacksonville, FL Phoenix/Scottsdale, AZ Laura E. Raffals, M.D. Rochester, MN Area of Focus: Crohn's disease, Inflammatory bowel disease, Ulcerative colitis, Pouchitis Elizabeth Rajan, M.D. Rochester, MN Area of Focus: Upper endoscopy, Endoscopic ultrasound, Capsule endoscopy, Balloon-assisted enteroscopy Francisco C. Ramirez, M.D. Phoenix, AZ Area of Focus: Upper endoscopy, Colon cancer Karthik Ravi, M.D. Rochester, MN Area of Focus: Gastroesophageal reflux disease, Eosinophilic esophagitis, Achalasia, Esophageal spasms Douglas L. Riegert-Johnson, M.D. Jacksonville, FL Area of Focus: Colonoscopy, Upper endoscopy, Fecal transplant, Chromoendoscopy, Pancreatic cancer, Lynch syndrome, Familial adenomatous polyposis Lewis R. Roberts, M.B., Ch.B., Ph.D. Rochester, MN Area of Focus: Hepatocellular carcinoma Barry G. Rosser, Jr., M.D. Jacksonville, FL Area of Focus: Liver transplant, Pre-transplant evaluation, Post-transplant long-term care, Cholangiocarcinoma, Primary sclerosing cholangitis, Hepatocellular carcinoma, Primary biliary cholangitis, Nonalcoholic fatty liver disease, Cirrhosis, Autoimmune hepatitis, Alcoholic hepatitis, Hepatopulmonary syndrome, Liver disease, Liver cancer, Hepatic encephalopathy Kevin C. Ruff, M.D. Phoenix, AZ Area of Focus: Balloon-assisted enteroscopy, Nutrition (Healthy eating) Kristy K. Rumer, M.D., Ph.D. Rochester, MN Area of Focus: Colorectal surgery, Rectal cancer surgery, Colon cancer surgery Medical Professionals Digestive Diseases Physicians