The author deals with health-care, medical, and mental health interpreting, which she defines as “the transfer of verbal and nonverbal messages across languages in real time, between users and providers of health-care services (including mental health) who do not share the same language”. The author continues to define the health interpreter throughout the article by discussing: (i) the settings in which the health interpreter usually works; (ii) the parties that are involved during this form of interpreting (the health-care provider, the patient, and the interpreter); and (iii) the multifaceted and complex role of the health interpreter. The author also looks into the research that has been carried out on health-care interpreting. The training and teaching of health interpreters are discussed as well. The author examines the lack of a standard method of assessing linguistic and interpreting skills of the interpreters. The article concludes with the professionalization of health-care interpreters and the ethics.