Doctors Mayo Clinic has one of the largest and most experienced practices in the United States, with campuses in Arizona, Florida and Minnesota. Staff skilled in dozens of specialties work together to ensure quality care and successful recovery. Find doctors and medical staff: Edit search filters close Narrow your search Doctor's Name, Condition Or Procedure By location Phoenix/Scottsdale, AZ Rochester, MN By last name 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 There are no doctors 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 active 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 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 There are no doctors whose last name begins with the letter U U There are no doctors whose last name begins with the letter V V Find a doctor whose last name begins with the letter W W Find a doctor 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 By conditions treated No results found By procedures performed No results found By spoken language No results found Reset all filters Search Tips Use quotes for phrases. Even if there are no auto-suggestions within the search field, hit "Search" anyway, as you may still get results. Displaying 1-4 out of 4 doctors available Last Name Initial: P Rish K. Pai, M.D., Ph.D. Pathologist Phoenix, AZ Areas of focus: Inflammatory bowel disease, Colon cancer, Transplant rejection, Liver tumor, Fatty liver disease Shabana F. Pasha, M.D. Gastroenterologist Phoenix, AZ Areas of focus: Colonoscopy, Upper endoscopy, Capsule endoscopy, Balloon-assisted enteroscopy, Inflammatory bowel disease, Colon cancer..., Gastrointestinal bleeding Show more areas of focus for Shabana F. Pasha, M.D. Kate S. Pedersen, M.D. Oncologist Rochester, MN Areas of focus: Chemotherapy for colon cancer, Colon cancer, Rectal cancer, Anal cancer, Small bowel cancer, Young-onset colon cancer, ...Young-onset rectal cancer, Appendix cancer Show more areas of focus for Kate S. Pedersen, M.D. William R. G. Perry, M.B., Ch.B., M.P.H. Colon and Rectal Surgeon Rochester, MN Areas of focus: Colon cancer surgery, Rectal prolapse, Pelvic floor dysfunction, Pelvic floor defecatory dysfunction, Ulcerative coliti...s, Inflammatory bowel disease, Crohn's disease, Colon cancer, Rectal cancer, Recurrent cancer Show more areas of focus for William R. G. Perry, M.B., Ch.B., M.P.H. Request an appointment Conditions treatedSpecialty groups June 17, 2025 Share on: FacebookTwitter Early-Onset Colorectal Cancer GroupSectionsOverviewTests & proceduresConditions treatedDoctorsSpecialty groupsExpertise & rankingsResearchClinical trialsCosts & insuranceReferrals SectionsRequest an AppointmentOverviewTests & proceduresConditions treatedDoctorsSpecialty groupsExpertise & rankingsResearchClinical trialsCosts & insuranceReferrals ORG-20584173 Medical Departments & Centers Early-Onset Colorectal Cancer Group