So I got a new job. I'm switching in the middle of the month so my insurance for the old job will continue until the end of the month. The new job benefits "start day 1" but I get an infusion that requires a preauthorization and it will take some time to get added to the new insurance system and for my doctor to get authorization from the new insurance.
In the mean time, can I use the old insurance, which is still active, to get my treatment and stay on schedule while the new insurance is still getting set up? I know sometimes insurances can argue about who is responsible if they find out you have double coverage but what about a situation where you need a preauth but you cant get that on the new insurance because you dont exist in their system yet?