The Mayo Clinic Internal Medicine Review begins by quoting a 2003 Gallup poll of 1000 US adults that found that 98% of those queried want their physicians to be board certified and that nearly 80% valued recertification as well. In fact, slightly more than 50% of this group would seek a new internist if they learned that their internist's certification had expired. Physicians have responded accordingly. In 2005, approximately 7000 candidates sat for the certifying examination, and 92% passed. The same year, approximately 4200 physicians who had become board certified 10 years prior took their recertification examination, and 82% passed.
Pinsky L. Mayo Clinic Internal Medicine Review. JAMA. 2009;301(12):1288-1289. doi:10.1001/jama.2009.390