Behavioral health conditions are disproportionately experienced by people living with Human immunodeficiency virus (HIV), including young Black gay, bisexual, and other men who have sex with men (GBMSM). Left unaddressed, these symptoms can adversely impact HIV care outcomes. Improving the integration of behavioral health and HIV care services has been proposed as a strategy to address this challenge. To conduct a pre-implementation study exploring barriers and facilitators to improving HIV and behavioral health care integration at two HIV clinics in Atlanta, Georgia. We conducted a mixed-methods study guided by the Consolidated Framework for Implementation Research (CFIR). Sixty (60) HIV care providers, behavioral health care providers, and social service providers participated in cross-sectional surveys, and a subset of survey participants (15) also participated in a qualitative in-depth interview to explore CFIR constructs in greater depth. We focused on Intervention Characteristics, Outer Setting, and Inner Setting as the most relevant CFIR domains. Within each of these domains, we identified both facilitators and barriers to improving HIV and behavioral care integration in the two clinics. Participants agreed that enhancing integration would provide a relative advantage over current practice, would address young Black GBMSM and other patient needs, and would be compatible with the organizational mission. However, they also expressed concerns about complexity, resource availability, and priority relative to other clinic initiatives. Participants were enthusiastic about improving care integration but also invoked practical challenges to translating this idea into practice. Future research should test specific implementation strategies and their potential effectiveness for improving the integration of behavioral health and HIV care, as a strategy for improving well-being among young Black GBMSM and other people living with HIV.