Upvote:2
This website (no affiliation) offers health insurance for all of the USA. When searching around for quotes, most websites redirect to that page.
Upvote:4
I have used Aetna PPO California and BlueCross BlueShield PPO Massachusetts through my employers: they both cover all US states equally (I tried it myself by receiving medical coverage in other states). Coverage is much more limited if outside the US.