Advancing equity and justice in undergraduate biology education requires research to address the experiences of disabled students. Scholars working in disability studies have developed models of disability that inform Discipline-Based Education Research (DBER). To date, DBER literature has been predominantly informed by the medical and social models of disability. The medical model focuses on challenges that affect people with disabilities on an individual basis, while the social model focuses on how one's surrounding environment contributes to the construction of disability. In this essay, we discuss past DBER research and opportunities for future research using each of these models. We will also discuss a third, less commonly used model that offers exciting opportunities to drive future research: complex embodiment. Complex embodiment positions disability as a social location that reflects a greater societal value structure. Further examining this value structure reveals how ability itself is constructed and conventionally understood to be hierarchical. Additionally, we explain epistemic injustice as it affects disabled people, and how future education research can both address and counteract this injustice. We discuss how expanding the frameworks that serve as lenses for DBER scholarship on disability will offer new research directions.