Code 86258 describes a test to identify an antibody to gliadin (deamidated) (DGP), such as DGP IgG or DGP IgA, in a specimen such as serum. A common lab method for this test is an immunoassay, such as enzyme–linked immunosorbent assay (ELISA). The presence of DGP IgG and/or DGP IgA aids in diagnosing celiac disease, which is an autoimmune disorder that inflames the small intestine in response to dietary gluten. The test results also may help clinicians monitor patient adherence to treatment.
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