Michelle Riba, M.D., M.S. has been recognized as one of America's Top Doctors for Cancer by Castle Connolly Medical. Castle Connolly Medical Ltd. is a healthcare research and information company. Founded in 1991 by a former medical college board chairman and president, Castle Connolly's goal is to help guide consumers to America's top doctors and top hospitals. Castle Connolly's established survey and research process, under the direction of an MD, involves tens of thousands of top doctors in America and the medical leadership of leading hospitals. As a result, finding doctors and top hospitals can be a simple and painless process for all.