Using the concepts of constructivist authenticity and existential authenticity, I will analyse how claims to, and experiences and understandings of authenticity, are central to medical tourism. This is achieved by examining the interplay of places, spaces, objects, practices and bodies that create this cultural phenomenon. This includes a concern with how medical tourism is constructed around and performed through the perceptions of bodies, and the experiences of being a body. It is these complexities and their interdependencies that provide medical tourism its dynamism. This theorizing of medical tourism goes beyond existing studies that primarily seek to define it or restrict it to typologies, by analysing the practices and experiences that actually constitute this significant social phenomenon.