Marcelo Antônio Cartaxo Queiroga Lopes is a Brazilian cardiologist, who served as minister of health of the Federative Republic of Brazil, from 23 March 2021 to 31 December 2022. 
Queiroga holds a degree in medicine from Federal University of Paraíba. He completed his medical residency at the Hospital Adventista Silvestre and the Hospital Beneficência Portuguesa. In 2010, he completed a doctorate in bioethics at the University of Porto.

He is currently Director of the Department of Hemodynamics and Interventional Cardiology at Hospital Alberto Urquiza Wanderley and interventional cardiologist at Hospital Metropolitano Dom José Maria Pires, both in the state of Paraíba. He also served as a Director of the Brazilian Society of Hemodynamics and Interventional Cardiology between 2012 and 2013. He is a member of the Regional Council of Medicine of the state of Paraíba. Queiroga is also currently serving as president of Brazilian Society of Cardiology (SBC).