IntroductionThe US Military is experiencing a rise in HIV infections among gay and bisexual men (GBM) serving on active duty, yet little is known about this population’s uptake of pre-exposure prophylaxis (PrEP), an evidence-based intervention for HIV prevention. This mixed methods study examines the facilitators and barriers to PrEP access and uptake among active duty GBM.MethodsActive duty GBM were recruited using respondent-driven sampling (2017 and 2018). Participants (n= 93) answered quantitative survey questions on PrEP interest and accessibility. Another set of participants (n= 10) discussed their PrEP experiences in qualitative interviews.We conducted descriptive and bivariate analyses of quantitative data, while qualitative data were analyzed using structural and descriptive coding techniques.ResultsApproximately 71% of active duty GBM indicated interest in accessing PrEP. A greater proportion of those who disclosed (vs. did not disclose) their sexual orientation to their military doctor discussed (p< 0.001) or accessed (p= 0.017) PrEP. The following qualitative themes emerged: (1) providers’ negative views and knowledge gaps related to PrEP; (2) lack of a systems approach to PrEP access; (3) confidentiality concerns; and (4) reliance on peer networks for PrEP guidance and support.ConclusionsStudy results indicate that active duty GBM are interested in and want to discuss PrEP with their military doctors, but gaps in providers’ PrEP-related knowledge and skills, as well as mistrust in the military health care system, remain.Policy ImplicationsA system-wide approach that addresses confidentiality concerns and removes procedural barriers to PrEP access is recommended to improve PrEP uptake in this population.