My dentist billed me for a procedure that they said was verified by my insurance. How can I fight this bill?

Question Details:

The dentist's office informed my husband that he needed a dental procedure. We asked if it was covered under our insurance. The nurse called and verified and said yes it would be covered. The surgery was performed. Months later, we received a bill from the dentist stating the insurance provider denied our claim. I called the provider and asked why. They advised me that when the dental office called to verify the procedure the dentist's office was informed that it was not covered. However, they still performed the surgery and are billing us. We would not have done the work if we knew it was not covered. Important Notice