Imagine you go to a hospital for a routine procedure. You’ve made sure your hospital and doctor are covered by your insurance. The procedure goes well and you head home to recover. Two weeks later, you get the bill, but instead of the copay you expected, you get a bill for nearly $4,000. Turns out, the anesthesiologist who assisted with your procedure was “out of network” and your insurance won’t cover that bill as expected. You’ve received a surprise medical bill and now owe the difference between what your insurance will pay the out-of-network anesthesiologist and what you were billed.