Doctors are smart people, but these days we know more about the human body and keeping it healthy than any one person could possibly fit in their head, no matter how smart he or she might be. That's why we have specialists, doctors who focus on a particular aspect of patient care. For example, cardiologists focus on the heart, and ways to treat heart disease, while endocrinologists focus on everything dealing with the endocrine glands and hormones.

Others concentrate on a specific area of the specialty and may focus on certain body systems, specific age groups or complex scientific techniques to diagnose or treat particular medical conditions.

Use the interactive tool below to learn about the more than 145 specialties and subspecialties where ABMS Member Boards offer certification.