Rural-to-urban migration in Nairobi Metropolitan Area is a significant social phenomenon with substantial implications for healthcare utilization and access. A systematic search strategy was employed to identify relevant studies. Studies published between and were included in this review. Findings indicate that rural-to-urban migrants tend to use healthcare services more frequently than their urban-born counterparts, particularly for acute illnesses (80% of migrants reported utilising health care compared to 65% of urban residents). This study highlights the critical role of comprehensive community-based healthcare initiatives in addressing the unique health needs of rural-to-urban migrants. Healthcare policymakers should prioritise integrating migrant-specific services into existing infrastructure and enhancing public awareness campaigns targeting these populations. Migration, Health Care Utilization, Nairobi Metropolitan Area, Rural-Urban Movements Treatment effect was estimated with $\text{logit}(p_i)=\beta_0+\beta^\top X_i$, and uncertainty reported using confidence-interval based inference.