Extreme obesity is a serious health issue in Aotearoa New Zealand, with structurally marginalised groups, including Māori, and Pacific Peoples, disproportionately affected. Existing hospital services do not always offer optimal care for this patient group. The proposed activation activities are: 1) Develop a national research network of end-users, clinicians and researcher to guide future research priorities and activities; 2) Use Evidence and Gap Map methodology to identify what is known /not known in this area of health delivery. We will engage with tangata whenua in a Treaty-based partnership arrangement and also have meaningful Pacific involvement. These activities will provide a strong foundation of evidence and collaboration opportunities for future research. This project will inform the design of a larger empirical research project to examine what aspects of health delivery specifically designed for people with extreme obesity are working, for whom and in what context.