Hi.
I had a US Blue Cross plan provided to me for free as an early retirement perk by my former employer. It had coverage anywhere in the world. There actually were private doctors that would accept it there, but the list was by no means extensive. The plan was considered "catastrophic coverage" as there was a really hefty out-of-pocket deductible that had to be paid before the normal 80/20% split in costs would kick in. Once that was taken care of, it covered pretty much anything medically necessary as it was governed by the US ACA regulations, regardless of my place of residence. It also would have paid for medication. If my medication charges were what you are currently paying, I'd have met the deductible in three months. (If I had to go out of the BC network, it would reimburse a percentage of my costs, after that deductible. I think it was about half, sorry, I just don't remember.)
In looking at an old "pay" stub, it looks like the company was paying about $225 a month for my coverage, but reminders that it was a group plan for a very large employer. I have no idea if it would be possible to get a similar plan while living overseas, but it might be worth looking into. I am thinking (and I could be wrong) that if you are not of retirement age, there would not necessarily be underwriting involved because of the ACA. But I'm not sure about the international aspects of that. I know that if I had wanted to change from the plan I was on to another offered to me, but that had a much lower initial deductible and higher monthly premium costs, I could have done so with no medical underwriting involved. But, again, that was a plan through a US employer. I'm not sure if it can be done as an individual or not. Definitely worth checking into, though.
Good Hunting!
PS - I found medical costs there are considerably lower than in the USA, so you might want to figure that into your equation. If you could direct pay to a private doctor there, it would possibly still be cheaper than if you had to do the same in the USA, or pay for the insurance premiums, if you don't use a lot of highly specialized care?