Public health education specialists and nurses often work interprofessionally in the public health setting. Using a mixed-methods design, this exploratory study evaluated the effect of an online interprofessional case study activity on nursing and public health education students' perceptions of each other's professional role. For the public health experimental group only, a statistically significant change (p < .05) was found in their perceptions of the professional roles of nurses including large changes in six specific domains. Recommendations for implementing interprofessional education programs include more emphasis on education about professional scopes of practice and roles/responsibilities of the health professions.