As a general rule yeah you can, however the price for stuff if you’re not insured is very expensive, but it will likely still be much cheaper than the USA, and also if it’s not an emergency you might have trouble being able to get to a doctor. Let me give you an example, we were visiting Spain when my wife fell and twisted her ankle, we had to call an ambulance, she had an emergency consultation with an X-RAY (luckily she didn’t broke anything), and because we had forgotten our sanitary card we had to pay foreign prices, i.e. €200. That looks expensive to us because if we had brought that card it would have been free, but that same thing in the US could cost us $5000 so overall lot cheaper.

That being said, in Ireland for my wife to go to an Endocrinologist we had to:

• Register with a GP
• Book an appointment for that GP
• Pay that appointment
• Convince the GP you need to see an Endocrinologist. If he disagrees you won’t get to an Endocrinologist.
• The GP books the Endocrinologist appointment for you, or sends an email to the endocrinologist allowing you to book it
• You pay for the Endocrinologist appointment
• You go there and explain your symptoms, he’ll likely order blood exam and ask you to return on another day
• You book and pay the blood exams
• Do the blood exam
• Book and pay the return consultation to the endocrinologist

Overall cost was around €1000 and took us over a month to go through all of that. And again this might feel cheap for you, but to us feels expensive. And because of the initial requirement to register with the GP tourists can’t do it. Not sure how other countries work, in Spain we book stuff through our insurance and just show the insurance card and haven’t paid anything in over a year.