Rochester, Minnesota Clinical Profile


Ian D. Hay, M.D., Ph.D., is a consultant in the Division of Endocrinology, Diabetes, Metabolism, and Nutrition at Mayo Clinic. He also serves as an associate medical director for the Department of Development and is a professor of medicine in the College of Medicine, Mayo Clinic.

Dr. Hay has served as principal investigator and co-investigator for research grants funded by the National Cancer Institute and other sources. He has authored a significant number of peer-reviewed articles, book chapters, editorials and abstracts, and co-authored a textbook titled "Clinical Endocrine Oncology."

Focus areas

Dr. Hay's efforts have helped develop a computerized database of more than 3,500 patients with differentiated thyroid carcinoma (DTC) initially treated at Mayo Clinic over seven decades. As part of this research, patients and their archival tumor tissues have been studied to provide further information on molecular pathogenesis, identify patients at high risk of cancer-related death, and define a rational management program for both initial therapy and subsequent follow-up.

In 1991, Dr. Hay first treated a DTC patient with ultrasound-guided percutaneous ethanol ablation. Subsequently, he and his sonographic colleagues have further developed this safe and inexpensive outpatient therapy and now treat annually more than 100 DTC patients coming to Mayo with residual neck nodal disease.

Professional highlights

  • Dr. Richard F. Emslander Professorship in Endocrinology and Nutrition Research, Mayo Clinic
  • Member — American Association for Cancer Research, American Association of Clinical Endocrinologists, American Thyroid Association, Society of Endocrinology (U.K.), Endocrine Society, European Thyroid Association
  • Fellow — American College of Endocrinology; American College of Physicians; Royal College of Physicians of Edinburgh, Glasgow and London
  • Honorary Fellow, Royal College of Physicians of Ireland
  • Journal Review and Editorial Activities — Annals of Internal Medicine, Archives of Internal Medicine, Cancer, Clinical Endocrinology (Oxford), Journal of Clinical Endocrinology and Metabolism, New England Journal of Medicine


Administrative Appointment

  1. Emeritus, Division of Endocrinology, Diabetes, Metabolism, Nutrition, Department of Internal Medicine
  2. Supplemental, Division of Endocrinology, Diabetes, Metabolism, Nutrition, Department of Internal Medicine

Academic Rank

  1. Professor of Medicine


  1. PhD - Medicine University of Glasgow, Scotland
  2. MB ChB - Medicine University of Glasgow, Scotland
  3. BSc - (Hons) Pathology University of Glasgow, Scotland

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