Dr. Irwig is a general endocrinologist with a particular interest and expertise in androgens. His research has focused on men with persistent sexual and non-sexual side effects of finasteride (Propecia), the transgender community and men with borderline testosterone levels. He is a well-published author with his research appearing in multiple journals including Current Opinion in Endocrinology, Diabetes and Obesity, Diabetic Medicine, Endocrine Practice, JAMA Dermatology, Journal of Clinical Endocrinology and Metabolism, Journal of Clinical Psychiatry, Journal of Sexual Medicine, Lancet Diabetes & Endocrinology and Nature Reviews Urology. His research findings have been featured in many national and international mainstream publications and broadcast outlets including: The Today Show, NBC Nightly News, ABC World News, CBS News, MSNBC.com, CNN, Men’s Health Magazine, Men’s Journal and The Philadelphia Inquirer.
Dr. Irwig has presented over 75 lectures at hospitals and medical schools across the world on several topics including male hypogonadism, care of transgender patients and the use and abuse of anabolic steroids. He also serves as a reviewer for over 25 peer-reviewed medical journals.
He is currently is President of the mid-Atlantic chapter of the American Association of Clinical Endocrinologists (AACE). He serves on national committees for AACE as well as the Endocrine Society, including the Endocrine Self-Assessment Committee (ESAP).
Dr. Irwig received his M.D. degree from Cornell University and completed his residency in internal medicine at the University of Virginia. He was a senior fellow in endocrinology, metabolism, and nutrition at the University of Washington in Seattle.