Thanks!
Yes there is an HSA and an FSA, and a company contribution to the HSA as well.
So financially it makes the most sense to either choose the company plan or stay on their plan as well as mine.
I guess I’m mostly weighing quality of the network in case of a rare health condition where in-network expertise may not be very strong.
I guess that’s probably not very likely as he will be in the suburbs of a fairly large metropolitan area, so hopefully his available networks are pretty robust.