Here is their process: Have the patient check in and sign off on mystery documents that they don't show you unless you ask. If you ask, they will just turn the monitor around. If patient asks for a low cost procedure, make a "mistake" and schedule them for the more costly one.
Also, if you need a cavity filled, it will turn into a root canal and crown whenever possible. Everyone needs tooth scaling not just regular cleaning. Laser for those gums is essential for everyone but your insurance won't reimburse. Xrays, xrays, xrays.....
If you look like you can pay (or your insurance will), prepare to get hit with some high cost - mediocre dental work. If you have half a brain cell, run far, far away.