In 2002, a total of 6898 physicians in general internal medicine generated 90% or more of their Medicare claims from services to hospitalized patients. The bars show the percentage of these physicians who were predominantly practicing hospital medicine, predominantly practicing outpatient medicine, or generating few or no Medicare claims in the years before and after 2002. Only 36.9% of these physicians devoted the majority of their time to inpatient care in 1999; 9.5% were primarily outpatient physicians, 2.9% were listed in other specialties, and 50.7% had few or no billing cades (indicating that they were still in training). By 2006, a total of 63.0% of the physicians identified as hospitalists in 2002 were still devoting the majority of their time to inpatients, 8.8% were primarily outpatient general internists, 9.2% were in other specialties, and 19.0% had few or no evaluation-and-management charges (suggesting that they might have returned to training). In these analyses, “predominantly practicing hospital or outpatient medicine” was defined as 50% or more of evaluation-and-management claims generated from the care of hospital patients or outpatients, respectively. “Few or no Medicare claim” was defined as fewer than five claims per year. Data for the years 1998 and 2000 were not available