Marvin E. Belzer

Marvin E. Belzer, MD serves as a Clinical Professor of Pediatrics and Medicine (Part-Time) at the University of Southern California, with primary clinical affiliation at Children's Hospital Los Angeles (CHLA). His expertise centers on adolescent medicine, specializing in HIV/AIDS, sexuality, and chronic fatigue syndrome within vulnerable youth populations.

Dr. Belzer's research demonstrates profound focus on adolescent HIV care and medication adherence, pioneering mobile health interventions using text messaging and cell phone support systems for youth with HIV and chronic conditions. His work extensively addresses sexual health disparities among transgender and gender-expansive youth, including PrEP initiation and HIV prevention strategies, while also investigating HPV vaccination outcomes and contraception adherence in HIV-positive adolescents. Critical contributions include development of stepped-care approaches for sexual risk reduction and analysis of anal dysplasia prevalence in young men with HIV.

Analysis of his 2023-2025 publications reveals dominant trends in technology-driven adherence solutions and health equity interventions for marginalized youth. Key methodological approaches include sequential multiple assignment randomized trials (SMART), mixed-methods cohort studies, and usability testing of mobile apps tailored for transgender youth. His research consistently employs innovative frameworks like the supportive accountability model to address structural barriers in adolescent healthcare delivery.

Dr. Belzer leads significant initiatives including the Healthy Young Men's Cohort study examining health disparities among Black and Latino young men who have sex with men. His grant-funded work spans NIH-sponsored clinical trials evaluating digital adherence tools and nationwide protocols for HIV care continuum optimization, with particular emphasis on recruitment strategies for hard-to-reach adolescent populations.