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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. The diagnosis of celiac disease usually involves blood tests and then an endoscopy, which is a medical procedure that allows your doctor to look directly at your small intestine and take small samples to examine further under a microscope.