The difference between the full
cost of a treatment (which the uninsured often are charged), and the amount the
insurance company tells them they will pay is often quite a bit. If you have cash and offer to pay up front (for a discount) you may get charged less than what they can get out of the insurance company, because it's less hassle and instant money for them.
Just a thought, even if you had to borrow the money.
Will your Endo accept results from another facility?