In this paper, we consider adding the construct of trust to the Unified Theory of Acceptance and Use of Technology (UTAUT) model in the context of individual use of self-diagnosis medical support systems. We believe that these are important factors in an individual and personal setting. By the adding the concepts of knowledge-based trust, system-based trust, and belief-based trust to the UTAUT model we will be able to increase our understanding of individuals intention to use medical expert systems such as self-diagnosis medical systems. We feel that our conceptual model will have implications for medical system providers and government agencies as well as future academic researchers studying individual use of technology within a global/national context.