In 2015, the Lamar Soutter Library and the Department of Psychiatry at the University of Massachusetts Medical School received a grant from the National Library of Medicine to design an online tool that will provide persons with serious mental illness a means to acquire resources that will assist them in learning about co-morbidities often faced by this population. One of the first steps in creating this tool is to identify health-related websites that will meet strict quality measures applicable for use by our target audience. To facilitate this process, subject experts with skills in both mental health and physical health have been identified and will be asked to complete a comprehensive survey that will evaluate the identified websites. The survey will address aspects of each website reviewed such as content and credibility, format, usability and interactivity plus the evaluation of etiologic, diagnostic, therapeutic and/or prognostic information contained on the site. This poster will describe the evidence-based methodology used in developing and testing this survey instrument. Preliminary results, discussion of evaluative data and next steps will also be discussed.