I haven't been tested yet because of the cost of the blood work. I am pretty sure I am gluten intolerant or have celiac so I stopped eatting it completely last April. There are actually quite a few blood tests that OHIP doesn't cover because they take a lot of time and work in the lab. So I think this might be the reason why some aren't covered because if they allowed all of these long blood tests to be free it would likely cause problems in labratories and people would get behind.
It's silly yes, since I think gluten intolerance is more common than we think and the cost stopped me from getting the test, 125 dollars for a blood test or 125 dollars for food.