Oral Pathology Associate, Inc. cheating and over charged lab Los Angeles California

This pathology lab charged a lot and kind of cheating.  At first you are told by your dentist's assistant your insurance will probably cover it then, the she also has you sign a waiver form you will be totally responsible for the lab bill, but don't explain you anything. Then come a big lab bill and the lab's stuff are very rude. They said they won't bill insurance company and you should pay, even they theaten you. The dentist is Thomas Yong oral surgenry. I think he is a agent of this lab though I don't know how much kickback he can get from the lab.