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Test Code DGPIGAG Gliadin (Deamidated) IgA Reflex to IgG

Important Note

The Gliadin (Deamidated) IgA Antibody tests includes an assessment for IgA deficiency at no additional charge with reflex to Gliadin (Deamidated) IgG.

Additional Codes

MLAB: DGPIGA
Powerchart: Gliadin Ab IgA w Reflex to IgG
Epic: Gliadin Antibody, IgA [LAB871]
MA Cerner: Gliadin IgA Reflex to IgG

Test Method

Multiplex Flow Immunoassay; BioRad BioPlex

Specimen Requirement

Serum is preferred, EDTA or heparinized plasma are also acceptable. Gel tubes are acceptable.

Additional Specimen Collection Information

Collect blood in a serum or plasma gel tube (EDTA or heparin).

  • Minimum volume: 500 mcL
  • Hemolysis: > 2+ not acceptable
  • Lipemia: > 3+ must be ultracentrifuged
  • Icterus: no significant interference noted
  • Storage: specimen is stable for up to 7 days refrigerated; freeze at -20oC for long term storage.
    Thoroughly mix thawed specimens; it is also recommended to centrifuge thawed specimens to remove gross particulate matter. Avoid multiple freeze-thaw cycles (up to 3 cycles are acceptable).

Performance

Testing is performed Monday through Friday.
Routine: Typically completed within 24 hours after the specimen arrives at the testing site.

STAT: Typically completed within 4 hours after the specimen arrives at the testing site.

Reference Value

Gliadin (Deamidated) IgA:

  • < 15.0 U/mL (Negative)
    The Gliadin (Deamidated) IgA Antibody tests includes an assessment for IgA deficiency at no additional charge with reflex to Gliadin (Deamidated) IgG.
  • ≥ 15.0 U/mL (Positive)

CPT Code Information

83516

Useful For

Gliadin (Deamidated) IgA:

  • Evaluating patients suspected of having celiac disease; this includes patients with symptoms compatible with celiac disease, patients with atypical symptoms, and individuals at increased risk of celiac disease
  • Evaluating the response to treatment with a gluten-free diet

LOINC Code Information

47393-4 Gliadin peptide IgA Ab [Presence] in Serum by Immunoassay