ABSTRACT This study uncovers the determinants of perceived threats that have long been associated with resistance to healthcare information technology in general, and electronic health records in particular. Conceptualised as perceived dissatisfaction with outcomes and perceived helplessness over process, these threats are discussed from the perspective of the Psychological Reactance Theory. Study participants consisting of a diverse group of healthcare professionals were drawn from sample frame of health practices. Data from a sample of 217 participants were used to test the model. Using structural equation modeling, the model relationships were analyzed, and hypotheses were tested. The study results show that perceived threats to electronic health records are triggered by two types of factors: namely, intrinsic stimuli like self-efficacy and performance expectancy; and extrinsic causes such as social enabling effect and social influence. The implications of these findings are particularly useful to both research and practice. Managers and informaticians in both healthcare and non-healthcare settings will find the results both instructive and helpful in mitigating resistance. Theorists will be enriched by the insights from the antecedents of perceived threats to advance research.