This article explores the current situation regarding the importance of access to healthcare in relation to the genesis and context of bioethics developed in Brazil, a country in which healthcare is understood through the national constitution to be a universal right of its population. Since the onset of the development of Brazilian bioethics at the beginning of the 1990s, topics relating directly and indirectly to the field of public health have been a priority in the bioethics agenda. The article considers the socioeconomic context within which conflicts occur, an issue that has been addressed in other scientific articles on bioethics in Latin America. It presents the main conceptual bases of intervention bioethics, a critical approach that has been developed as a reference point in this region, with the aim of analyzing (bio)ethical issues and indicating solutions that relate specifically to the different forms of social exclusion that influence the health conditions and lives of people in Brazil, as well as in other peripheral countries in the Southern Hemisphere and of the world in general. The article calls attention to some of the problems and challenges that the Brazilian public health system has been facing. An international agenda of “universal health coverage” is one of the main global threats to implementing the universal right to healthcare as it has been understood in Brazil.