J.W.
You really need to check with your insurance company and an attorney.
The thing is if he has employer provided insurance he doesn't pay the full amount of the insurance. No court is going to make him pay more just because you want to move. That is your choice.
I work in a medical billing office and we get claims from all over the country but the address is St Louis, so he may be able to continue the insurance regardless of where you live so like I said, call the insurance company.