If you have health insurance, you can get the free EHIC (European Health Insurance Card), with which you get free emergency care anywhere in the EU. Some countries may charge you (me or my family have experience with Germany, Belgium and Czechia for free admission, and Austria where a bill is later sent to you). However, over a certain income the Irish are required to pay for private insurance (if you don't, you get taxed extra), and usually the insurance companies reimburse the costs as they are lower than they would have been in Ireland.