Have suffered from TN for over a decade. Tried a mountain of medication, surgeries, neurologist, etc. Recently, referred to May Clinic. After numerous examinations, tests, lab work, etc. told was motor cortex stimulator candidate and would find relief. Few days before surgery, health insurance company advised Clinic that this is considered investigational and would not approved. Any advise to someone would needs relief from the terrible pain. Any idea would be greatly appreciated