Trends in IM subspecialty certification—These 5 subspecialties illustrate the trend in the number of board certifications in internal medicine subspecialties issued since 1940. The decline seen after 2000 is true for most specialties, with a few exceptions.

*Projections based on data available through 2006.
Source: American Board of Internal Medicine. Number of candidates certified annually by the American Board of Internal Medicine. Available at www.abim.org/resources/dnum.shtm.