Yes.
I am considering the alternative plan because I'm not sure I want to take the risk of playing with changing SS and Medicare addresses as I've been Thai based so long and the address I would use is just a friend's address, I fear it would be red flagged as potential fraud.
This information on Advantage may be cleaner for people who have not made a SS claim yet.
They could start with a US address, avoid proof of life letters, then at 65 enroll in Part B also with their US address and buy an Advantage plan from this broker IF it works in Thailand!
Then if they get flagged it might be seen as more innocent than changing later just to use this insurance tactic.