He is currently a Professor of Medicine Emeritus at Northwestern University. His expertise lies in pituitary disease and pituitary hormones, in particular growth hormone and the growth hormone – insulin-like growth factor (IGF) axis. He has made many scientific contributions in his field, both in basic science and in its clinical application. He characterized the molecular isoforms of growth hormone in human blood, as well as their regulation and metabolism. He discovered the growth hormone binding protein, the circulating ectodomain of the growth hormone receptor, which facilitated elucidation of many aspects of growth hormone action and growth hormone receptor physiology and function. He also was among the first to describe a novel genetic syndrome of dwarfism caused by a mutation in the human growth hormone releasing hormone receptor.
Dr. Baumann has widely lectured on these and other topics around the world. He has authored over 215 peer-reviewed original reports, reviews and book chapters. He has served repeatedly on the Editorial Boards of Endocrinology and the Journal of Clinical Endocrinology and Metabolism. He has been an expert advisor to the government and the pharmaceutical industry. He has been listed in Who’s Who in America and is an elected member of the American Association of Physicians and the American Society for Clinical Investigation.