Over the last five decades, the gap between the haves and have-nots has consistently increased in the realm of access to healthcare services among different sectors of society: from quality of healthcare services, access to health supplies, technologies, and usage of health information and health prevention services, to vulnerability to certain types of diseases and health outcomes. Against this backdrop this edited collection - the first of its kind - uses the framework of communication in order to understand the underlying dimensions of health disparities and the communicative processes, policies, methodologies, and messages that are deployed with the goal of increasing access, improving quality, and addressing the underlying causes.