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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.
How do doctors diagnose celiac disease? Celiac disease can be hard to diagnose because some of the symptoms are like symptoms of other diseases, such as irritable bowel syndrome (IBS) and lactose intolerance. Your doctor may diagnose celiac disease with a medical and family history, physical exam, and tests. Tests may include blood tests, genetic tests, and biopsy.