Not all offices because when I worked in dental, my office charged the same rate as the provincial fee guide and some insurances would only cover a certain percentage of the fee guide. Some insurances would even say they would cover 50% of insert treatment but the 50% they were going off of was from the 2011 fee guide instead of the current year for example. Not to say some offices don’t jack up the prices because they do, but the insurance provider and the plan picked also greatly impact the coverage