The European Health Insurance Card (or EHIC) is issued free of charge and allows anyone who is insured by or covered by a statutory social security scheme of the EEA countries and Switzerland
 to receive medical treatment in another member state for free or at a reduced cost, if that treatment becomes necessary during their visit (for example, due to illness or an accident), or if they have a chronicpre-existing condition which requires care such as kidney dialysis. The term of validity of the card varies according to the issuing country.
The intention of the scheme is to allow people to continue their stay in a country without having to return home for medical care; as such, it does not cover people who have visited a country for the purpose of obtaining medical care, nor does it cover care, such as many types of dental treatment, which can be delayed until the individual returns to his or her home country.
It only covers healthcare which is normally covered by a statutory health care system in the visited country, so it does not render travel insurance obsolete.