So it sounds like you do have a PPO after all? "Preferred" usually just means in-network.
One would think that, but that was just the general listing for providers via the insurer website saying that.
My actual coverage information for dental makes absolutely no distinction or mention of "in-network" or "out-of-network" provider/care/coverage, whereas my health insurance coverage does (dental is provided through the same insurer, difference coverage documentation). As I said, my dental is just flat coverage no matter what. No networks, no nothing.
