I was diagnosed a few weeks ago with two gad 65 tests that were higher than 250. The doctor spoke to another who had done iag testing and that was .93 sent to Mayo Clinic now my doctor wants me to do iag testing. I have all the stiff person. Symptoms. Stiffness tripping startle easy stress sets it off. My ivig is on hold I was due to start Monday. He wants iag test done. He ordered 2 gad 65 now is waffling.