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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.
If your blood test is negative and your doctor remains suspicious that you have celiac disease, your doctor may consider using another blood test to determine if you do have this condition.Diagnosis. During your visit, your doctor may order blood tests to help see if you have a gluten-related disorder.f your blood test is negative and your doctor remains suspicious that you have celiac disease, your doctor may consider using another blood test to determine if you do have this condition.