In the past, I've used Cigna Global to provide full medical insurance to me anywhere on earth. This isn't travel insurance, it's actually full expat health cover. If I'm in Hong Kong and I need a checkup, they'll cover that. If I'm in France and I need to get my teeth cleaned, that's covered too. They even have direct billing relationships with many providers because they're Cigna. Preventative is fully covered. https://www.cignaglobal.com