<<Disclaimer: Verify this information before applying it to your situation.>> It is easily the most common diagnostic dilemma that I am put in is seeing someone who went on gluten free diet for several months felt better then decided they wanted medical confirmation of the diagnosis. They go to a doctor and get biopsies or the serologic blood tests which come out normal. They are then told they don't have it and subsequently get sick on gluten . It is then hard to get permission from the insurance company to go back in to get the biopsies again. THE STATE OF THE DIET IS CRUCIAL TO THE TIMING AND INTERPRETATION OF THE BIOPSIES OR THE BLOOD TESTS WHEN LOOKING FOR CELIAC DISEASE!! EXCLUSION OF GLUTEN FROM THE DIET CAN MASK BOTH THE BIOPSY RESULTS AND THE BLOOD TESTS RESULTS!!! sorry for shouting but my professional frustration reflects your personal frustration with the lack of familiarity with celiac disease in the USA. I am happy to discuss my experience in dealing with these issues with any MD who maybe not as familiar with celiac disease Joseph A. Murray MD Coordinator, Celiac Disease Clinic Associate Professor of Medicine, University of Iowa IA 52242