Despite federal focus on reducing mental health disparities for Black Americans, mental health disparities persist, resulting in reduced access to and benefit from mental health care. Amid calls for deeper examination of etiology, the current literature review introduces discrimination in the form of microaggressions at the institutional level as one changeable systemic cause for mental health disparities. In combining the mental health disparity and microaggression literatures, I first review the evidence regarding prevalence and contributing factors for current mental health disparities and microaggressions. Next, I examine the potential contributing role that microaggressions as a form of institutional betrayal within mental health care may play in perpetuating these disparities. Finally, I review implications regarding the particular role of mental health care systems, the field of psychology in general, and Black American psychologists specifically in systematically reducing mental health disparities for Black Americans.