It’s a pretty common scenario: you’re looking to book a medical appointment, so you go to your insurance company’s website to find an in-network doctor. You book the appointment, see the doctor, and all seems well — until you get a whopping bill. Apparently, that doctor wasn’t in your network after all, and now you’re faced with out-of-network charges.

This happens more often than we think. Unfortunately, insurance company websites are notoriously fallible. Not only that, but they change so frequently that it can be difficult to nail down just who is and isn’t covered. At some point or another, just about everyone will have to deal with a situation where their insurance doesn’t cover a provider.

It’s easy to feel duped in this scenario. Navigating the ins and outs of insurance is hard enough, but there’s nothing more frustrating than being fed incorrect information.

So what should you do?