Never ever will i have my ureteral stent removed or a vasectomy performed while physically, mentally or psychologically conscious of it . how can it be deemed medically necessary for insurance to cover general anesthesia? it is a must no question?

That is a question you need to direct to your insurance company. They determine what and when they cover any procedure in consultation with various experts they deem credible.

Certainly work with your insurance company and request a review. Also, check your contract. Have your doctor challenge the decision, if adverse. All states have an insurance commissioner, and you could petition the office for help, if no progress.