Regression analysis was used to analyze the geographic distribution of physicians Ln the Northeastern u.s. The ratio of general practitioners (GP's) to population, and specialists to population was calculated for each of the 299 counties in the region. The independent variable es were categorized into three types of factors: eConomic, professional , and quality-of life . Results indicated that both types of physicians responded similarly to eConomic and quality- of-life variables, but responded differently t o professional Considerations. This suggests that the urban Concentration of specialists vis-a-vis GP' s is due primarily to the relative importance of professional Considerations to specialists. Policy implications and directions for further research are presented .