People with psychosis have a considerably shortened life expectancy of up to 20 years when compared to the general population. Poor cardiometabolic health is a main contributory factor, which is a result of both treatment and reduced access to tailored behavioural support interventions. Addressing physical health disparities experienced by people with mental illness is a priority, yet, the increased disadvantage status of Māori within this mental health patient population has received limited attention. Māori are not only known to be disproportionately exposed to the risk factors for poor physical health and premature death compared to the general population, but they also experience high rates of psychotic disorders. However, the intersection between Māori ethnicity, psychosis, and physical health remains unexplored and will be investigated in a four-phase, Māori-led project.