Patient portals provide patients with electronic access to their health records. Since there has been limited use of patient portals in mental health settings, there is a lack of research regarding the usability of the technology amongst this patient population. The purpose of this study was to assess the usability of a mental health patient portal, and to provide the study site with design recommendations. Ten (n=10) participants completed a guided user interface assessment on laptops and tablet devices, along with a structured questionnaire. Findings revealed a number of modifiable aspects of the portal design to improve the usability of the technology for the end user.