The healthcare SME sector in Latin America, particularly in Peru, plays a crucial role in providing primary care services. However, these enterprises face significant operational challenges, including inefficiencies in patient care processes and reliance on manual records. This research addressed these challenges by proposing a Lean Service-based model aimed at optimizing operational efficiency and improving the quality of care. The implementation of Lean tools such as 5S, standardized work, and Kaizen led to a 39.3% reduction in consultation waiting times and a 33.3% increase in productivity. These findings highlight the model's effectiveness in enhancing both operational efficiency and patient satisfaction. The study's academic and socio-economic impact is profound, offering a replicable model for healthcare SMEs to improve service delivery. Further research is encouraged to explore the integration of emerging technologies to sustain and amplify these improvements across the healthcare sector.