South African migrants face unique challenges in accessing HIV testing and prevention services due to geographical dispersion and social stigma. A mixed-method approach was employed including surveys (n=150) and qualitative interviews (n=20). Data were analysed using thematic analysis for qualitative insights and descriptive statistics to quantify service utilization. Mobile health clinics significantly increased HIV testing uptake by 47% among migrant communities, particularly in urban areas where services are more accessible. Mobile health clinics have proven effective in bridging the gap for HIV prevention among South African migrants, enhancing accessibility and reducing stigma. Continued support for mobile clinic programmes alongside targeted public education campaigns to sustain engagement and improve outcomes.