I have no personal experience with the “international” policies, but have friends that do. Their policy required that they be outside the US six months a year. I’d read the fine print carefully because you wouldn’t want to have a policy that wouldn’t cover you if you had to return to the U.S. for medical care.
This is slightly OT, but our very limited experience with routine medical care outside the U.S. (mostly in the Caribbean), has been that it is very good and very cheap relative to what you’d pay here. I’m considering having a routine surgical procedure done next time I go back to the Caribbean because it will cost 1/10 of what it would here.