The so-called double entry door - one for the patients of the public system and another one for customers of private health plans - is a growing phenomenon in many public health care facilities, especially in the State of São Paulo, Brazil, where several university hospitals linked to public universities assign resources to attend private clientele. The objective of this article is to understand the reasons for the adoption (or not) of the double entry door at two public university hospitals, seeking to identify its implications for the hospital and other stakeholders. Methods included desk research of relevant literature and interviews conducted in 2014 with representatives of selected hospitals. The results show the existence of two divergent narratives on the subject. The favorable narrative emphasizes the additional fundraising and the possibility of keeping fully dedicated teachers working at the university. The unfavorable narrative emphasizes the discrimination arising from the segmentation between paying and non-paying patients and the use of public resources for attending private clientele. By emphasizing the solution of structural problems through the privatization of public services, we conclude that the adoption of double entry door in university hospitals reinforces existing inequalities in society. © 2016, UNIV SAOPAULO. All rights reserved.253808820