Dr. Koenig has published extensively in the fields of mental health, geriatrics, and religion, with over 400 scientific peer-reviewed publications, nearly 70 book chapters, and 40 books. His research on religion, health and ethical issues in medicine has been featured on dozens of national and international TV news programs including ABC's World News Tonight, Dr. Oz Show, and several times on The Today Show, Good Morning America, and NBC Nightly News.