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Celebrating National Doctors' Day

March 30, 2018
GI fellows
Dr. Jeffrey Singer, Dr. Murray Feldstein, and Dr. Jeffrey Singer (l to r), fellows at the Goldwater Institute

March 30, 2018

It’s National Doctors’ Day, and we’re celebrating by honoring three doctors who have dedicated themselves to advancing liberty as fellows at the Goldwater Institute: Dr. Murray Feldstein, Dr. Rafael Fonseca, and Dr. Jeffrey Singer.

This week, Dr. Fonseca released a new paper with the Goldwater Institute, Cost vs. Value and the Price of Innovation in Cancer Care: Oral Anticancer Drugs in Multiple Myeloma, as a Case Study. Dr. Singer  authored an op-ed last year regarding the opioid crisis and policies that could help save lives. And last month, Dr. Feldstein wrote on this blog about expanding access to dental care with dental therapists.

We’re proud to work alongside these medical professionals as we fight to help all Americans live freer, happier lives.

Dr. Murray Feldstein: 

The first graduate of the urology residency at the University of Arizona School of Medicine, Dr. Feldstein started his Urology practice in Flagstaff, Arizona in 1974 and practiced there actively until 2000. He then joined Mayo Clinic Arizona as a urologic consultant and engaged in clinical, educational, and research activities. Retiring in 2015 as an Assistant Professor of Urology, he remains on the emeritus staff.

Dr. Feldstein has participated in many professional and civic activities. He was twice elected to the Flagstaff City Council and was Vice-Mayor for two years. He was on the Board of Directors of the Flagstaff Medical Center for 8 years. He served in the medical corps of the United States Army, 82nd Infantry (Airborne), from 1968 through 1970.

Dr. Feldstein graduated magna cum laude as salutatorian from Ursinus College with a B.S. in 1963. He then received his M.D. from the University of Pennsylvania School of Medicine in 1967 and his certification from the American Board of Urology in 1976.

Dr. Rafael Fonseca:

Dr. Rafael Fonseca is a visiting fellow at the Goldwater Institute. He is the Getz Family Professor of Cancer and a Professor of Medicine, Mayo Clinic College of Medicine. He is a consultant in the Division of Hematology/Oncology at the Mayo Clinic, AZ and Chair of the Department of Medicine. Dr. Fonseca earned his MD at Universidad Anahuac, Mexico. He completed a residency in internal medicine at the University of Miami, FL, and a fellowship in hematology and medical oncology at Mayo Graduate School of Medicine, Rochester, MN. He is a clinical investigator for the Damon Runyon Cancer Research Fund.

Dr. Fonseca’s practice has focused on the diagnosis and treatment of plasma cell disorders and leading the multiple myeloma team in its effort to develop a better understanding of the disease and its impact on patients. In his laboratory, Dr. Fonseca has led his team of researchers in concentrating on the genetic nature of the clonal cells of plasma cell disorders. He is also interested in myeloma bone disease, prognostic markers and development of new therapies for the disease.

Throughout his training and career, Dr. Fonseca has received numerous awards and honors, including the Young Investigator Award in Hematology (Celgene – Achievement Awards for Clinical Research in Hematology), Damon Runyon-Walter Winchell Clinical Investigator Award, and the International Waldenström Macroglobulinemia Research Award. Most notably he is a Mayo Clinic Distinguished Investigator, the highest academic distinction given to investigators at his institution. Dr. Fonseca has an adjunct academic appointment at the Translational Genomics Research Institute (TGen). His research has been funded by the National Cancer Institute (R01, P01, SPORE), the Leukemia and Lymphoma Society, the Multiple Myeloma Research Fund, and the Damon Runyon Cancer Research Fund. He has given many national and international presentations as a visiting professor, and has authored numerous articles (over 200), book chapters, editorials, abstracts, and letters.

Dr. Jeffrey A. Singer

Dr. Singer received his BA from Brooklyn College of the City University of New York and his MD from New York Medical College. After completing his Surgical Residency at the Maricopa County Medical Center in Phoenix, AZ, he became certified by the American Board of Surgery as a specialist in General Surgery in 1982 and began a private surgical practice.

He is a principal and founder of Valley Surgical Clinics, Ltd., one of the oldest and largest private group surgical practices in Arizona, founded in 1986. He is a Fellow of the American College of Surgeons, and in the past has served on the editorial advisory board of AZ Medicine, the journal of the Arizona Medical Association. He is an Assistant Clinical Professor at the Arizona College of Osteopathic Medicine at Midwestern University in Glendale, AZ. He has also served on the Arizona Medical Association Committee on Legislative Affairs.

He was Treasurer of Arizonans for Health Care Freedom, sponsor of the Arizona Health Care Freedom Act, which amended the Arizona Constitution in 2010. Dr. Singer has a deep interest in public policy about which he has written and lectured extensively. He is on the Advisory Board of the Arizona State University Center for Political Thought and Leadership, and has served as an Instructor in the Center’s Continuing Education Program at the ASU Extension. In the past he was an adjunct scholar at the Reason Foundation in Los Angeles, CA, and he currently is an adjunct scholar at the Cato Institute in Washington, DC.

In addition to articles appearing in the peer-reviewed medical literature, he has contributed chapters to books on public policy and has had numerous articles appear in such publications as the Wall Street Journal. Washington Times, Investor’s Business Daily,,, US News and World Report, Reason Magazine, the Orange County Register, The Hill, Des Moines Register, Tampa Tribune, Detroit News and the Arizona Republic. He has appeared on local and national television and radio, including Fox News, CNBC, and the Fox Business Channel.



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