I've been relying on my Visa medical coverage for trips to USA. However, that expires when one is 65 years old.
I found out that the Gold Global Payment Card from my local credit union has 31 days of coverage up to age 75! I've applied today. It is, in some cases, a "no fee" card.
Update. The Gold Global Payment card is $96.00 per year and requires a 5000.00 line of credit. It is still a good deal.