Background: A Primary Care Model Programme was implemented in Hungary between 2013 and 2017 in order to increase access of disadvantaged population groups to primary care and to offer new preventive services for all clients. In a country with single-handed practices, four group practices or GP clusters were created in the Programme. Six GPs comprised one cluster who together employed nonmedical health professionals and nonprofessional health mediators, the latter recruited from the serviced communities, many of them of Roma ethnicity. Health mediators were tasked by improving access of the local communities – including its vulnerable Roma members – to existing and new services. Health mediators were interviewed about their work experiences, motivation, and overall opinion as members of the clusters as part of the Programme evaluation. Methods: As part of the Programme evaluation, structured interviews were conducted with all 40 health mediators employed at the time in the Programme. Interviews were transcribed and content analysis was carried out. Results: Three themes emerged from the transcripts. The first centered on the health mediators’ personal characteristics such as motivation to join the Programme, the way their job increased their self-esteem, social status and health consciousness. Domains of the second theme of their work included importance of on-the-job training and of their insider knowledge of local communities, as well as their pride to have become members of the primary care team. The third theme covered overall functioning of the Programme of which they had mostly positive opinions, notwithstanding some criticism regarding procurement. Conclusions: Health mediators had earlier worked in various European countries specifically to improve access of Roma ethnic groups to health services but the Hungarian Model Programme was globally the first in which health mediators, non-professional workers became equal members of the primary care team as employees. Their contribution and overwhelmingly positive experiences, along with their useful insights for improvement call for the establishment and funding of health mediator positions in primary care especially in areas with large numbers of disadvantaged Roma populations.