A shortage in the U.S. HIV clinical provider workforce limits equitable access to HIV prevention and treatment services, particularly for adolescents and young adults aged 13–34, who account for 58% of HIV infections nationwide (Armstrong, 2020; Bono et al., 2021; Centers for Disease Control and Prevention, 2023; Kelly et al., 2024). Predicted more than a decade ago, this shortage reflects the retirement of early HIV specialists, limited growth in infectious diseases training programs, and insufficient HIV-focused pathways in primary care residencies (Budak et al., 2021; Gilman et al., 2016; Gilman B., 2013; Stevens et al., 2008; Weiser et al., 2016; Weiser et al., 2019). Despite efforts to expand training, infectious disease fellowship enrollment declined by 8.1% between 2008 and 2022, and more than half of fellowship programs did not fill available positions in 2024 (Kelly et al., 2024). In 2024, 51% of fellowship programs did not fill available spots for infectious diseases fellows. Further, dedicated HIV training pathways built into family medicine residency programs generated only 38% of physicians providing HIV health services (Budak et al., 2021). Compounding these challenges, few HIV-trained clinicians practice in southern or rural regions, which now represent the epicenter of the U.S. HIV epidemic (Centers for Disease Control and Prevention, 2023; Schafer et al., 2017).
National workforce projections further underscore these inequities. Health Resources and Services Administration analyses estimate that the rural infectious disease workforce will meet only 14% of projected demand between 2024 and 2036 (Department of Health and Human Services, 2024). Similarly, the adolescent medicine workforce, another critical pipeline for youth HIV prevention and treatment, is projected to decline and remains unevenly distributed geographically (Fields et al., 2024). Insurance access further constrains care delivery, as an estimated 25% of family physicians and 15% of pediatric primary care physicians caring for youth with HIV no longer accept Medicaid, the primary payer for people living with HIV (Kates et al., 2021). Together, these factors create persistent barriers to youth-focused HIV prevention and treatment and threaten progress toward the Ending the HIV Epidemic initiative, which aims to reduce new HIV infections in the United States by 2030 (Armstrong, 2020; HHS, 2022).
These workforce gaps are particularly concerning given that youth aged 13–24 have the highest proportion of undiagnosed HIV infections at 44%, substantially exceeding other age groups (Centers for Disease Control and Prevention., 2021). HIV testing rates in this population remain low, with fewer than one in four youth reporting having been tested (Mustanski et al., 2020; Zapata et al., 2024). Evidence indicates that youth are significantly more likely to undergo HIV testing when they have clinicians with whom they can discuss sexual health and HIV openly, underscoring the importance of accessible, developmentally responsive care (Mustanski et al., 2020; Zapata et al., 2024). Ensuring a workforce capable of engaging youth in these conversations is therefore central to HIV prevention and early treatment efforts.
Nurse practitioners represent a rapidly expanding segment of the U.S. healthcare workforce and are well positioned to address these gaps (Bureau of Labor Statistics, 2023; K., 2023). As nationally board-certified advanced practice nurses, NPs receive graduate-level training in advanced assessment, pharmacology, and population-focused care, with an emphasis on addressing social, behavioral, and structural determinants of health Federal investments in HIV-focused NP training programs, including those supported by HRSA, have further strengthened this workforce (Farley et al., 2016). Prior studies demonstrate that HIV care delivered by NPs achieves clinical outcomes comparable to physician-led care, with some evidence of advantages in prevention counseling, adherence support, and retention (Wilson et al., 2005; Zhang et al., 2020; Weiser et al., 2024). However, evidence specific to adolescents and young adults with HIV remains limited, despite their disproportionate burden of disease and elevated risk of disengagement from care (Mgbako et al., 2022). Relational aspects of care, including trust, may be especially salient for sustaining engagement in this population.
This study was conceptually informed by the Trust-Link Relational Transition Model (Blinded, 2025), which frames trust as a relational process that shapes engagement, continuity, and health outcomes for youth with chronic illness. The model integrates nursing and trust theory to emphasize informed trust, relational presence, and collaborative care as mechanisms that support youth engagement during vulnerable care transitions. Given evidence that trust mediates retention and adherence in HIV care, particularly among youth facing stigma and developmental transitions, this framework guided our selection of patient-reported trust measures and our hypothesis that NP-led HIV care would demonstrate relational strengths alongside equivalent clinical outcomes.
Prior studies comparing nurse practitioner and physician HIV care demonstrate comparable quality across key clinical outcomes, including antiretroviral therapy initiation and prescribing, immune markers, viral suppression, and sexually transmitted infection testing (Wilson et al., 2005; Zhang et al., 2020). More recent findings further support the role of nurse practitioners in high-quality HIV care. An analysis of the Centers for Disease Control and Prevention’s Medical Monitoring Project (2019–2021) involving 6,323 adults, found that individuals whose primary HIV care providers were NPs had significantly higher rates of retention in care and were more likely to receive HIV testing recommendations than those with infectious disease (ID) physician providers (Weiser et al., 2024). In addition, among young adults, nurse practitioners provided a greater number of HIV prevention and treatment services per patient than both infectious disease and non–infectious disease physicians, including routine HIV care, STI testing, and adherence counseling (Weiser et al., 2024; Zhang et al., 2020). Despite this growing evidence base, data specific to adolescents and young adults with HIV remain limited (Mgbako et al., 2022). Accordingly, the aim of this study was to compare HIV-specific clinical outcomes and patient-reported outcomes among youth with HIV receiving care from nurse practitioners versus physician providers.