This portion of the linked article seems to contradict your claim of "has not raised the rates for any of their services since 1995"

>Had the pathology fees that apply to the examination of breast masses not increased, our price would be the same now as it was in 1997, but alas it is now $2,365. Only three other fees have increased since we began quoting them over the phone in 1997.

That said, I'll admit that the claim is broadly true.