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 By location Phoenix/Scottsdale, AZ 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 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 active 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 Find a doctor 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 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 Reset all filters Displaying 1-1 out of 1 doctors available Last Name Initial: N Donald W. Northfelt, M.D. Internist Oncologist Phoenix, AZ Areas of focus: Lymphoma, Breast cancer, Colon cancer, Congenital blood clotting disorder, Rhabdomyosarcoma, Rectal cancer, Sarcoma Request an Appointment at Mayo Clinic Conditions treatedSpecialty groups March 21, 2020 Share on: FacebookTwitter Mayo Clinic in Rochester, Minn.,Mayo Clinic in Phoenix/Scottsdale, Ariz., and Mayo Clinic in Jacksonville, Fla., have been recognized among the top Cancer hospitals in the nation for 2020-2021 by U.S. News & World Report. Learn more about this top honor Oncology (Medical)Department homeSectionsRequest an appointmentOverviewConditions treatedDoctorsSpecialty groupsExpertise & rankingsLocations, travel & lodgingClinical trialsResearchThe Mayo Clinic experience & patient storiesCosts & insuranceNews from Mayo ClinicResources for medical professionals SectionsRequest an appointmentOverviewConditions treatedDoctorsSpecialty groupsExpertise & rankingsLocations, travel & lodgingClinical trialsResearchThe Mayo Clinic experience & patient storiesCosts & insuranceNews from Mayo ClinicResources for medical professionals ORG-20180179 Departments & Centers Medical Departments & Centers Oncology (Medical)