Cross-border healthcare is not a complete novelty when accessing to the EU. Also in Slovenia, it has existed already before the accession. Cross-border healthcare was based on national law, bilateral and multilateral social security agreements. However, with the accession, new possibilities of acquiring cross-border healthcare from public funds have emerged. One is relying on cooperation of public health systems by coordinating national social security systems, and the other is based on free movement of goods and services on the EU internal market, which should be promoted, but at the same time not overburden national public health systems. Cross-border healthcare is characterised by a variety of legal relations that can be established, and asymmetry of information may lead to the undesired steering of not (fully) informed cross-border public patients. Not only EU law, as developed by the legislature and the judiciary, is influencing national public health systems, but the same applies vice versa. Solutions in national systems and practices influence European cross-border healthcare law as well.