Before bikes I spent a lot of time SCUBA Diving and in all my travels the only thing a government required of me was my passport and a return ticket. I did use medical services once on the island of Bonaire. I was seen by a doctor who would take no money and had no interest in my insurance coverage at all. Socialized medical care! I did not need a appointment called and saw the doc within an hour of the call try that in the US.