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Tissue Transglutaminase IgA

Anti-Tissue Transglutaminase IgA

Tube Type

Test ID LAB723
EPIC Order
 TISSUE TRANSGLUTAMINASE, IgA
CPT Code(s) 86364
Group/Individual Test Individual
Laboratory Clinical Immunology
Tube Station 30
Specimen Routine: 4 mL blood/Gold SST tube
Availability Once a week
Turnaround Time 1-7 days
Reference Range   Negative
Comments
  • Testing for IgA antibodies to tissue transglutaminase is performed using the EliA Celikey assay. This automated assay uses the automated Phadia 250 system.
  • Results are reported as Positive, Negative, or Equivocal with quantitative value.
  • Some sera demonstrate a pattern of reactivity indicating the likely presence of IgA deficiency. Sera with suspected IgA deficiency are noted in the results. Serum from patients with IgA deficiency can be tested for IgG TTg antibodies. This testing is available via the referral testing laboratory. 

Reviewed by J. Carr on November 04, 2025

UNC Hospitals
McLendon Clinical Laboratories
101 Manning Drive
Chapel Hill, NC 27514