David S. Cooper, M.D. MACP is Professor of Medicine and Radiology at the Johns Hopkins University School of Medicine, and Director of the Johns Hopkins Thyroid Clinic. He serves as Editor-in-Chief for Endocrinology at Up-to-Date. He is a former Contributing Editor at JAMA, and former Deputy Editor of the Journal of Clinical Endocrinology and Metabolism. He is the past Chair of the Subspecialty Board for Endocrinology, Diabetes, and Metabolism of the American Board of Internal Medicine. Dr. Cooper is the past President the American Thyroid Association, and is also the recipient of the American Thyroid Association’s Distinguished Service Award and its Paul Starr Award. He is also the recipient of the Distinction in Clinical Endocrinology Award from the American College of Endocrinology and the Endocrine Society’s 2016 Outstanding Scholarly Physician Award. He has also served on ATA guideline taskforces for thyroid nodules and thyroid cancer, hyperthyroidism, hypothyroidism, and the ETA guideline taskforce for subclinical hyperthyroidism.