Fundamental reform in the health sector in Greece was the voting of 1397/83 law, which forecasted the foundation of National Health System. A fact that contributed in the growth of a welfare state. The Health System is the total sanitary units of a country that are in continuous collaboration and functional interdependence for the maintenance and health promotion. From 1983 and so on, efforts of growth and modernisation of health system have been realized that contributed in the configuration of its, up to date, structure. Motive force of reformation and establishment of health system constitutes its financing from various sources of public or private sector.