This study explores the spatial accessibility of high-tech health services across municipalities on the Spanish Iberian Peninsula, focusing on the adequacy of service provision by haemodynamic facilities relative to potential demand. A comprehensive analysis utilising a Geographic Information System (GIS) was conducted to evaluate the spatial distribution of high-tech health services, employing the enhanced two-step floating catchment area (E2SFCA) method within a gravity model framework. Findings reveal a disparity in health service coverage, with peripheral municipalities in the larger Autonomous Communities exhibiting low to very low access to hightech health services. Despite this, the majority of the population benefits from satisfactory health coverage. The study underscores the importance of improving health service accessibility in underserved areas through infrastructural enhancements or the establishment of new facilities, advocating for equitable health service distribution in line with principles of social justice. The methodology proposed herein serves as a valuable tool for health policymakers in addressing spatial inequities in health service provision. Through the lens of territorial accessibility and spatial planning, the research highlights the critical role of high-tech health infrastructure in ensuring comprehensive health coverage. The results advocate for targeted interventions to enhance health service accessibility, particularly in sparsely populated areas at the periphery of large communities, thereby contributing to the broader discourse on health equity and spatial justice in healthcare planning.