Physicians are a largely untapped resource for evaluating medical care delivery in an ambulatory care facility. This study includes the attitudes of physicians in assessing care at the Northwestern University Medical School Clinics (NUMSC). A self-administered questionnaire was mailed to all clinic chiefs, attending physicians, and resident physicians who had worked in the clinics during the summer of 1973. Using a similar questionnaire, personal interviews were conducted with a sample of patients in the clinics. Physicians were consistently more critical than patients in their responses to the battery of questions on satisfaction and on indices constructed from these responses. The findings indicate a negative relationship between the physician's position of authority in the organization and his report of satisfaction: clinic chiefs were consistently more critical than either attending physicians or resident physicians, while the comparisons between attendings and residents were more mixed. Further, salaried physicians were more critical than those who received no salary and non-AMA members were more critical than AMA members. Adding the assessment of physicians to those of patients introduces a useful complement and strengthens the utility of such evaluation instruments.