Dr. Sydney A. Westphal, MD is an Endocrinologist at Mayo Clinic, Phoenix. She received a medical degree from The University of Cincinnati College of Medicine. She is board-certified in Internal Medicine and Endocrinology, Diabetes, and Metabolism. Her research interests are Internal Medicine Endocrinology, Diabetes, and Metabolism, Thyroid Disease, Androgen Excess, Thyroid Function Tests, Blood Sugar Levels.