denied dental claim

I got a letter from my dental office saying the insurance claim was denied. now I need to find out more, as it sounds more like the insurance provider said more information was needed from the dental office. I was told I would be called by somebody in billing, I was not. so I may have to go over somebody's head to get this squared away. I already paid what they told me I needed to pay.
   I did get to the performance venue tonight. it included ones about the sing 'pour some sugar on me', getting some CDs, getting ready for visiting st. louis, a panhandler, 'excuse me', and finding some stuffed animals. it does help to get there as early as possible as I then tend to go on earlier.