The first global Citizen Science for Health Conference (CS4H) will take place on October 29^th – November 1^st  2023 at the University of Twente in Enschede, The Netherlands. The aim of the conference is to provide a state of the art of the CS4H domain and establish a bridge between long-standing traditions on patient participation in health research to more recent and intensive modes of citizen science in health. The conference focuses on different kinds of multidisciplinary scientific collaborations between citizens, patients, medical staff, health care providers, researchers, students, policy makers, funding agencies, companies, etc. This includes approaches such as citizen science, personal science, patient involvement, inclusive research and community-based health research.