Addressing Health Disparities and Social Determinants of Health: Lessons from NHS England Core20PLUS5

Health disparities are shaped more by social determinants of health than by clinical services, yet most health systems remain designed around medical care. NHS England’s Core20PLUS5 approach sought to address this gap by improving equitable access to healthcare services while preserving local adaptability to address social care needs. It established a national approach designed to reduce health disparities by prioritizing the most deprived 20 percent of the population, locally defined “PLUS” groups, and five clinical focus areas, while embedding the approach within NHS planning and performance systems. The objective of this commentary is to examine the design and implementation of Core20PLUS5 and identify policy-relevant insights for health systems seeking to reduce disparities and better coordinate clinical and social care. Although the dissolution of NHS England prevented a formal evaluation of the programme, Core20PLUS5 illustrates both the potential and difficulty of using national priority-setting, local flexibility, standardized measurement, and shared data infrastructure to strengthen accountability for reducing disparities. Rather than evaluating programme effectiveness, this commentary situates the Core20PLUS5 experience within the broader literature on health disparities and comparative OECD health systems to identify policy-relevant lessons for health system reform. These insights extend beyond England, as other OECD countries face similar challenges in coordinating clinical services and social care across diverse governance structures. While approaches must be adapted to national contexts, the Core20PLUS5 experience offers policy-relevant lessons for aligning governance, implementation, and accountability to advance health equity.