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Dr. Felicia Cosman joined Helen Hayes Hospital in West Haverstraw, New York, in 1988, where she serves as an osteoporosis specialist, clinical scientist and medical director of the Clinical Research Center. She is also professor of clinical medicine at Columbia University. Dr. Cosman is a graduate of Cornell University in Ithaca, New York, and Stony Brook University School of Medical School in Long Island, New York. She received her internal medicine training and completed her endocrinology fellowship at Columbia Presbyterian Medical Center in New York City.

Dr. Cosman's research has included studies on the causes of osteoporosis and how estrogen, SERMS, and vitamin D work as treatments for osteoporosis.  Her major research focus is the use of teriparatide, a bone-building medication, in combination with antiresorptive agents, and in novel cyclic regimens, in the treatment of severe osteoporosis. She is the recipient of research grants from the National Institutes of Health, the Department of Defense, the National Multiple Sclerosis Society, and multiple pharmaceutical companies.

Dr. Cosman has published over 100 peer-reviewed articles in the osteoporosis field, in journals including the New England Journal of Medicine and The Lancet.  She is the author of What Your Doctor May Not Tell You About Osteoporosis (Warner Books) and co-editor of Osteoporosis: An Evidence Based Approach to the Prevention of Fractures (American College of Physicians). Dr. Cosman has served as clinical director of the National Osteoporosis Foundation since 1996. Since 2000, she has been annually elected to the Castle-Connolly list of Top Doctors, and has been featured in New York Magazine's "Best Doctors" and Hudson Valley Magazine's "Best Doctors.