Please click on the following link for the Health Service Executive (HSE) in Ireland for a list of Hospitals. All medical specialists operating in Ireland should be registered with the Irish Medical Council, you can check the registration details here.
It is important to note that a referral by a General Practitioner (GP) is essential to receiving medical care from a Medical Specialist. Therefore, seeing a GP should always be a starting point, unless one desperately needs to vist the Accident and Emergency (A & E) ward of a hospital - this is the Irish equivalent to an American Emergeny Room (ER).
If you reside in Northern Ireland, follow link to the U.S. Consulate General in Belfast for information regarding medical services in Northern Ireland.