Travel Insurance in Spain
It is advisable to get Travel Insurance when travelling in a foreign country as for a small outlay you can protect yourself against four types of loss: medical or health problems, property loss, trip cancellation or interruption, and emergency evacuation.
Before you buy Travel Insurance check your existing level of cover with your insurance company. Often medical insurance covers medical costs incurred abroad though you may need to get extra cover if you intend to undertake "risky" activities like skiing or sailing.
The cost of travel insurance varies widely, depending on the length of your trip, your age and health, and the type of trip you're taking. When you buy Travel Insurance also check that there is a 24 hour contact number that is reachable from the country you are going to.
Useful Links
Some private travel insurance companies in the UK and USA:
Norwich Union Insurance
The AA Insurance
Royal Mail Travel Insurance UK
Trip Insurance USA
Official webpage of the Spanish Health System - Instituto Nacional de Gestión Sanitaria (ex INSALUD)