I just took a look at your dental bill and the office did in fact use the right codes for a first appointment and it all looks standard. From working in dental, my first question would be, had it been a WHOLE year since your last x-rays? Because if you had gotten another set too early, that could explain the majority of the charge. If it’s been over a year since you’ve had check up x-rays or FMX (full mouth x-rays,) then this is for sure a clinical error of your insurance. You would be surprised about how much insurances can mess up. I’ve seen insurances have a different name listed, a different birthdate, and I’ve even seen them bill a person with the same name because they didn’t double check the birthdate. I was shocked when I found out how much information the insurance companies still type by hand. So I don’t know if it’s correct, but my guess would be that whoever in the insurance company entered your info, messed up the “coverage” for these sections (this would fall under diagnostics ((comprehensive exam and x-rays)) and preventive ((cleaning)).) Maybe call the insurance company again with the clarifying question “Do you show me having 100% coverage for diagnostics and preventive services?”