Your responses are most appreciated, thank you. I was afraid gluten consumption before the test was needed. Predictably, the test results were negative.
I have been relatively gluten-free for over a decade. I say relative because I allow myself to eat non-certified oats daily and drink some beers on the weekends. As others have reported, some beers I seem to handle fine and others not so well. I decided to include a celiac test in my annual physical because I am beginning to fear that if I am legitimately celiac rather than gluten-intolerant, I am doing long-term damage by consuming even the minimal amounts of gluten in non-certified oats and beer.
Unfortunately, it seems the test was a waste of money since I was told eating gluten beforehand was not necessary for an accurate reading. Drag.