This Data Bulletin presents findings from the Center for Studying Health System Change (HSC) 2008 Health Tracking Physician Survey, a nationally representative mail survey of U.S. physicians providing at least 20 hours per week of direct patient care. The sample of physicians was drawn from the American Medical Association master file and included active, nonfederal, office- and hospital-based physicians. Residents and fellows were excluded, as well as radiologists, anesthesiologists and pathologists. The survey includes responses from more than 4,700 physicians, and the response rate was 62 percent. Estimates from this survey should not be compared to estimates from HSC's previous Community Tracking Study (CTS) Physician Surveys because of changes in the survey administration mode from telephone to mail, question wording, skip patterns, sample structure and population represented. More detailed information on survey content and methodology can be found at www.hschange.org.