TheCommission's request for information about the EHIC from Spain takes the form of a letter offormal notice - the first step in EU infringement procedures.
Spainhas now two months to respond to the concerns expressed by theCommission.
Everything you need to know about the EHIC, which gives UK residents free or reduced-cost state healthcare when travelling in Europe.
The EU is probing reports Spanish hospitals are refusing to accept the European Health Insurance Card (EHIC). So, what does it mean for you?