The main premise for the implementation of Project P1 is the need to adapt the functioning information system in the health care sector in Poland to the requirements of the European Union’s Member States as part of the construction of the European Information Society. An important factor was also the state of information solutions in the area of health care in the country: their diversity and independence, including in particular the variety of technologies they use, which significantly impede and often prevent the exchange of medical data and documents between market participants involved in the diagnosis and treatment process, as well as assessing the quality of treatment and planning. The Polish healthcare system is characterised by a high level of complexity associated with the multitude and diversity of the entities involved. To illustrate the scale of needs, in order to provide medical care more than 38 million recipients operate tens of thousands of health care institutions of different sizes – from primary healthcare institutions to large provincial hospitals, over 12 thousand pharmacies, a number of supervisory, financing, policyholders and coordinating institutions.