This is a test of commonsense. Complete the next sentence:

How to report medical billing fraud
Contact the hospital's billing department.
In case the doctor or hospital made an honest mistake, it's best to bring the billing error to their attention as soon as you notice the problem. Look on the office's or hospital's website to find information regarding billing disputes.
If the billing department doesn't have contact information listed, call the office's main number and ask to talk to someone in charge of billing disputes. Request the cfo's contact information.