Writing is central to the academic and professional success of STEMM (Science, Technology, Engineering, Mathematics, and Medicine) students, yet there is little writing center scholarship examining how STEMM students use and perceive writing centers. This article presents quantitative findings from a mix-methods survey study examining STEMM undergraduate students’ usage of university writing centers. The study was conducted at a mid-sized, public health sciences research university in the Southeast. Findings from the survey suggest that STEMM students are likely to visit writing centers, but their visits overwhelmingly focus on coursework in the core curriculum rather than coursework within their majors. These students tend to view disciplinary writing as formulaic and content-driven, which affects writing center usage. They also express concerns about the ability of writing center staff to assist with scientific and technical genres. Throughout the presentation of results, the authors offer insight into practices they plan to implement to provide better outreach and support to STEMM students at their university. While study results are not generalizable to other institutions, they still provide insight into usage behaviors of STEMM students that can be useful to a variety of institutions as they work to support STEMM writers.