The last two decades have been marked by a series of health reforms that have transformed the way primary care services are delivered and organized. These reforms have also had an impact on clinical and administrative management practices within primary care structures. In Quebec, forms of clinical-administrative co-management - in which medical directors share responsibility for the day-to-day management of their clinic with one or more administrative co-managers - have been adopted within some family medicine groups. However, little is known about these co-management practices, including the perceived benefits of co-management, the challenges faced, the conditions required for positive co-management relationships and the impacts of these practices.