This paper offers a critical commentary on the essentialist concept of ethnicity, which, it is argued, underpins the discourse of transcultural health‐care. Following a consideration of the difficulties that ensue from the way in which ethnicity has been theorised within transcultural nursing in particular, the paper turns to a consideration of alternative ways of thinking about ethnicity, which have emerged from more recent social anthropology and postmodernism. It addresses the question of how to therorise ethnicity in a way that does (...) not entail its reification as a set of fixed cultural properties, and makes some tentative suggestions for the possibility of a critical culturalist approach to difference and healthcare practice, which must include a consideration of racisms. (shrink)