Usability evaluations are essential to the success of health information system implementation, but are often costly and dependent on right expertise being available. Heuristic Evaluation (HE) is considered a straightforward method consisting of clear stages. Involving clinicians in HE may facilitate usability evaluations in healthcare, yet there are challenges. Many questions remain unanswered regarding how to implement user involvement in HE; where and how could clinicians best be involved in this process? To what level of autonomy and with what added benefit? In this workshop, we will explore experiences of involving clinical users in HE, discuss challenges and best practice.