Rethinking Conscientious Objection in Health Care presents the case against the right of health care professionals to refuse delivery of certain health care services based on their moral views. It provides philosophical analyses of conscience and freedom of conscience, as well as the arguments and principles typically utilized when arguing in favor of allowing health care professionals conscientious objection. The authors criticize those arguments and offer a philosophical and historical analysis of the concept of professionalism, as well as an appeal to the nature of professional obligations, to build their case against the right to conscientious objection in health care. They explain why arguments for pluralism, tolerance, and diversity which support a right to freedom of conscience in society at large do not necessarily support the same right within the health care profession, or indeed any profession that is governed by internal norms of professionalism which an individual freely decides to enter.