WARNING! Although Dr. Core is a very good dentist, and I have no complaints there... they have obviously hired a new billing person who must be trying to make an impression.
Even though my end of the year bill in 2017 said zero balance I am now being back billed for work done in 2015 and 2016. I see that they have had billing problems in the past, according to some Yelp reviews, and they seem to care more about collecting a few dollars than they do about their patients or about retaining their patients. When I called them about this bill I was even told that I could switch dentist offices if I didn't like being back billed.
BEWARE!!