Dr. Rosenfeld received his B.A., summa cum laude, from Columbia University in 1968 and his M.D. with Honors from Stanford University in 1973. He joined the faculty at Stanford in 1980, was promoted to Associate Professor with tenure in 1985 and to Professor in 1989. In 1993, he left Stanford, to accept the position of Chairman of Pediatrics at Oregon Health Sciences University, where he served for nine years. In 2003, he returned to Stanford as the Senior Vice-President for Medical Affairs of the Lucile Packard Foundation. In 2008, he established STAT5, LLC, to provide specialized consultation services in endocrinology and pharamacogenomics, while maintaining his research laboratory at OHSU. 

Dr. Rosenfeld is an internationally renowned authority on the endocrine basis of growth and development and has been at the forefront of understanding the biology of growth hormone and growth factors for over 40 years. His work has elucidated physiological, pathological, cellular and molecular aspects of mammalian growth, as well as the role of growth factors and their receptors in the fetus, newborn, child and adult in health and disease. He is the author of over 660 publications, 8 edited books and 25 plays, and the recipient of numerous international awards.