The economic environment and the current health care debate have prompted a critical reevaluation of previous and current physician-hospital integration models. Even though the independent, self-employed, private practice, medical staff remains the most common model, surgical specialists such as vascular surgeons are increasingly being employed and integrated into health care delivery systems. The degree of integration varies from minimal to full integration or full employment. This review defines the forces driving these changes and analyzes the strengths and weaknesses of each employment model from the physicians' point of view. Strategies for the successful implementation of a 21st century integrative employment model are discussed.