How is celiac disease generally diagnosed?

Blood tests, biopsy: Celiac disease is diagnosed by finding certain types on antibodies on a blood test. A small intestine biopsy can be used for diagnosis. There is also a blood test to see if a person has the genes that are seen in celiac disease patients.

Labs, biopsy: Celiac is generally diagnosed by taking a history, performing a physical and then obtaining labs and or a small bowel biopsy.

Medical tests: Usually through blood work, however "gold standard" is numerous biopsies from the duodenum (small intestine) during an upper endoscopy.