This article describes the development of residents' report cards as one component of a curriculum on physician profiling for primary care residents. Thirty-two first-year residents matriculating into family practice, internal medicine, pediatrics, and obstetrics-gynecology residency programs in 1998 were profiled. The patient information in the report cards was limited to data on a panel of Medicaid patients initially seen in the resident ambulatory care clinics. All subsequent patient care for that population was also included. The method was multi-step and complex, involving hospital billing personnel and cooperation with a managed care partner. A three-session educational program was developed to introduce the concept of physician profiling. The first session consisted of a panel discussion on managed care. The second session was devoted to a discussion of hypothetical physician profiles with inappropriate length of stays, days/1,000, low numbers of office visits combined with high urgent-care use, and high outpatient services utilization. Small groups of residents participated in a problem-identification process as if they were members of a group practice. Residents identified problems in the reports and made suggestions for behavioral changes. A final session presented residents with their own personal report cards. Residents were surveyed both at the beginning of their first year and before and after the educational intervention on profiling. Resident attitudes, which were negative toward managed care at the outset, became generally more positive. Comparisons of pre-test and post-test means on the five-point Likert scale, using a paired-samples t-test, revealed significant changes in the residents' attitudes overall.