Your index value of 1.6 is very low and the negative supplemental says that with a pretty high degree of certainty, this is a false positive result. There is good agreement between people who get negative supplemental tests from LabCorp and subsequently get a negative Western blot. I would be happy to work with you on obtaining the western blot if that’s what you would like to do. I am very optimistic that the IgG test is a false positive in your situation.
Terri