David L. Bell, MD, MPH is a professor in the Department of Pediatrics (College of Physicians & Surgeons) and in the Heilbrunn Department of Population and Family Health (Mailman School of Public Health) at Columbia University Medical Center. Since 1999, Dr. Bell has been medical director of the Young Men's Clinic. In that capacity, he delivers primary care to adolescent and young adult males and is a strong advocate for the right of young men to have access to high quality and respectful services that address the issues relevant to adolescent and young men, which includes attention to their sexual and reproductive health.

Dr. Bell is active locally, nationally, and internationally. He advises and teaches medical students, residents, and public health students. He lectures and leads workshops nationally and internationally on young men's health issues. He is the a past President of the Society of Adolescent Health and Medicine (SAHM). He is co-founder and chair of the board for The Partnership for Male Youth, an organization whose mission is partner with youth and organizations to improve the health of adolescent and young adult males. Internationally he has worked with colleagues in the Dominican Republic, St. Lucia, and Uganda. He has served on the board of directors for Equimundo (formerly known as Promundo), an international organization that promotes gender equality and prevents violence by engaging men and boys in partnership with women and girls.