Healthcare services faced increasing difficulties in responding efficiently to patient demand, resulting in prolonged waiting times, fragmented processes, and rising operational costs. Although previous studies had explored continuous improvement in this sector, many failed to systematically integrate Lean Healthcare tools, limiting the achievement of sustainable and patient-centered outcomes. This gap in the literature represented a relevant research gap that justified the present study. The investigation applied value stream mapping, the 5S methodology, and process standardization to redesign critical workflows and eliminate non-value-added activities. As evidence of its effectiveness, the results revealed a 35% reduction in waiting times, a 22% increase in service efficiency, and a 19% improvement in patient satisfaction. These findings confirmed that the structured application of Lean Healthcare not only optimized key performance indicators but also provided a replicable framework for institutions with limited resources. Consequently, the study contributed academically by extending the use of lean principles to the healthcare context and offered practical implications to strengthen sustainability and quality in health systems.