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Celiac disease blood tests measure the amount of particular antibodies in the blood. The most common tests include: Tissue transglutaminase antibody (tTG), IgA class â the primary test ordered to screen for celiac disease.
Tests may include: 1  Blood test(s)- to check for infection and inflammation or other cause of symptoms such as celiac disease. 2  Stool sample- to check for parasite infections and hidden blood. 3  Lactose breath hydrogen test- to find out if you have trouble digesting milk products.  Abdominal x-ray- to check internal organs.