I would say you've got it as well whatzie. it's great that your doctor is diagnosing you on biopsy and gene tests alone! If you haven't been eating a lot of gluten then the DGP tests might be worthless. The DGP IgG is the most specific test for celiac with a 99-100% specificity rating, and the DGP IgA is also really good. As much as doctors like to give the ttg tests, they don't catch everyone. If you want to get it done great as there is a chance you might get a positive, but if not, you've already got your diagnosis.
Here are some links:
What makes the doctors think you have lupus or systematic inflammatory disease? Did they suggest that you try the gluten-free diet first to see if symptoms begin to resolve, and then revisit another diagnosis if they don't?
I have been going through hell since April. Had a million blood tests done, ANA negative, RA negative, elevated complement c4, elevated sed rate, elevated crp. extremely low b12. other tests are off also, i just can't remember them all. the last time i went to the rheumotologist he stated he believes it is one of the 2 and stated that sometimes it takes awhile to have any concrete to go on. the gi doc tends to agree with him and thats when he also had me do the blood work for celiac after going over the biopsies with me. i go back to the gi on weds to go over the celiac stuff.