A designathon (aka hackathon, sprint collaboration, intensive workshop) is a three-stage activity that includes an open call for ideas and participants, an intensive period of collaborative work, and follow-up activities. The purpose of this open call is to gather practices and practical tips related to designathons for health in order to inform the development of a global SIHI/TDR consensus statement on organizing health designathons. Our team are organizing this call for descriptions of how people have organized their designathons.