Be on the lookout as well for the distinction between primary and secondary medical coverage. Primary coverage will pay you directly in the event of a claim, and secondary cleans up extra expenses after you use the medical coverage you already have—for example, if you have a supplemental Medicare policy that covers travel. Primary coverage will be the easiest to manage; you’ll just submit the bills you paid and you’ll be reimbursed at the coverage rate in your policy.
Get online price quotes from (in alphabetical order): Allianz Travel, GeoBlue (a partner of Blue Cross and Blue Shield), IMG (International Medical Group), and Travel Guard.
A few sites work like airfare search engines and canvass multiple medical travel insurers, collecting a variety of quotes on one page. Squaremouth culls options from 20 insurers, and InsureMyTrip.com looks at 21.
Read the full Frommer’s article online here: https://www.frommers.com/tips/entry-requirements-customs/some-countries-require-proof-of-medical-insurance-now-how-to-get-it