BEWARE this dental group's billing office! Regents is supposedly a "preferred provider" under my insurance plan, and they contacted the plan to preauthorize all work. However, my plan reimbursed less than they said they would, so I kept getting bills even after paying "in full" at the end of each visit. My insurance company told me that Regents did not code the bills correctly, hence they were not fully reimbursed. Regents responded that the list of charges I was given prior to treatment was an "estimate" and that anything they did not collect from my insurance company on the first billing was simply my responsibility. They were not willing to double check their invoices or resubmit the charges (which my medical doctor's office does ALL the time). In fact, they sent two of my bills to their (awful) collection agency without even returning my calls about the unexpected charges! These were small bills, nickles and dimes against the hundreds I'd already paid them. Any other doctor I know would simply write off these small differences. Not these guys! Oh, and they run WAY behind schedule - plan on spending an eternity in their waiting room. Better yet, AVOID THIS GROUP!