Have you talked to your insurance and your pdoc's billing office about this? I've found many times they actually do take the insurance, even though they aren't listed in the list provided by the insurer. Just something I've found several times with insurance and in-network issues.
If you already did that, then I will send you good thoughts for finding the absolute best replacement person you can. Maybe a referral from the first one. (?) More than likely a new doctor can just review your file and you don't have to go back over stuff you've already covered. If you agree with your current treatment plan, I would think you could just pick up where you are; treatment follows a logical path. You'll get through it.