Bethany,
I cannot answer the insurance question so I will defer that to someone else who has more insight into that aspect. However, I have been through insulinoma testing at Mayo. The hospital in NC where I had my original 72 fast that was positive found 2 insulinomas with a endoscopic ultrasound after the fast. When hypoglycemia persisted after my Whipple procedure, my NC endocrinologist referred me to Mayo. Through a week of testing and subsequent surgery, there were 9 more insulinomas. Mayo has several tests that can be done when searching for insulinomas. I am happy to answer any questions you may regarding the testing and wish you the best in your journey! Take care!