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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.
Celiac Disease. Celiac Disease. A medical history, physical exam, and lab tests often point to celiac disease. The diagnosis is confirmed with a small intestine biopsy collected during an endoscopy, where a small tube is guided down a person's throat to the small intestine.