Journal article: Against a backdrop of massive investment in health data, this study is based on a quantitative survey conducted in 2016 among 1,700 policyholders of a non-profit insurance company (‪‪mutuelle‪‪) to shed light on the prevailing social representations regarding the use of health data in France. The survey measures policyholders’ interest in various innovative services that could be offered by the insurance company and that would make use of their health data. The analysis shows that respondents are both concerned about the security of their data and interested in the services. The worse the respondent’s state of health, and the greater his or her concerns about old age, the greater his or her interest. A lower social position goes hand in hand with greater interest, which could be a sign of social inequalities in access to health technologies.