Print Departments and specialties 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. Departments that treat this condition Neurology Rheumatology Areas that research this condition Neurology Research Doctors who treat this condition edit search filters Close Narrow your search By location Phoenix/Scottsdale, AZ By last name There are no doctors whose last name begins with the letter A A There are no doctors whose last name begins with the letter B B There are no doctors whose last name begins with the letter C C There are no doctors whose last name begins with the letter D D Find a doctor whose last name begins with the letter E E There are no doctors whose last name begins with the letter F F There are no doctors whose last name begins with the letter G G There are no doctors whose last name begins with the letter H H There are no doctors whose last name begins with the letter I I There are no doctors whose last name begins with the letter J J There are no doctors whose last name begins with the letter K K Find a doctor whose last name begins with the letter L L active Find a doctor whose last name begins with the letter M M There are no doctors whose last name begins with the letter N N Find a doctor whose last name begins with the letter O O There are no doctors whose last name begins with the letter P P There are no doctors whose last name begins with the letter Q Q There are no doctors whose last name begins with the letter R R Find a doctor whose last name begins with the letter S S There are no doctors 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 There are no doctors whose last name begins with the letter W W There are no doctors whose last name begins with the letter X X There are no doctors whose last name begins with the letter Y Y There are no doctors whose last name begins with the letter Z Z Reset all filters Displaying 1-1 out of 1 doctors available Last Name Initial: M Lester E. Mertz, M.D. Internist Rheumatologist Phoenix, AZ Areas of focus: Dermatomyositis, Vasculitis, Polymyositis By Mayo Clinic Staff Request an Appointment at Mayo Clinic Diagnosis & treatment July 01, 2020 Print Share on: FacebookTwitter Related Polymyositis: Can it affect my lungs? Associated Procedures Electromyography (EMG) MRI Products & Services Book: Mayo Clinic Family Health Book, 5th Edition Book: Mayo Clinic on Arthritis Newsletter: Mayo Clinic Health Letter — Digital Edition Show more products and services from Mayo Clinic PolymyositisSymptoms & causesDiagnosis & treatmentDoctors & departments Research: It's All About Patients CON-20310625 Patient Care & Health Information Diseases & Conditions Polymyositis