Structural characteristics of medical group practices.

This study of 247 medical group practices explores the structural characteristics of these emerging organizational forms. As size and complexity of services increase, group practices tend to increase the number of hierarchical levels of authority and become more formal and bureaucratic. Complexity of services was found to have more influence on the formation of subdivisions, while size was more influential in terms of levels of administration. Large group practices, and especially large multispecialty groups, appear to engage in a highly organized corporate style of medical practice. In these organizations, important professional decisions are shifted from the clinician to the administrator.