Biomarkers · Chemical
t-Transglutaminase (tTG) IgA
A celiac disease screening is a blood test that looks for signs that you may have celiac disease, an autoimmune disorder that causes a serious allergic reaction to gluten. Gluten is a protein found in wheat, barley, rye and other grains.
Celiac Disease Screening, MedlinePlus, National Library of Medicine
- Primary unit
- U/mL
- LOINC codes
- 31017-7
- Tests that measure t-Transglutaminase (tTG) IgA
- Labcorp 9, Quest Diagnostics 2
Ranges
Compare the reference ranges labs publish with guideline targets, diagnostic cut-offs, study-based ranges and practitioner targets. Move across the rows to check a value against each range, and open a source from the legend. How to read these ranges
t-Transglutaminase (tTG) IgA, U/mL
- Lab reference ranges1 lab
All 1 published ranges, with sources
Lab reference ranges
Labcorp, all ages0 to 10 U/mL
All ages
Labcorp prints below 7.0 U/mL as negative, 7.0 to 10.0 as equivocal and above 10.0 as positive.
Labcorp test menu, Tissue Transglutaminase (tTG) IgA (164640), 2026
Tests
Check the catalog code, specimen, method and preparation for every test that measures t-Transglutaminase (tTG) IgA. Select up to five tests to compare them side by side.
Labcorp 9 tests
Single-analyte tests
Tissue Transglutaminase (tTG), IgA 164640
Serum · Fasting not stated · Turnaround 2 - 3 days
Labcorp catalog pageMethod and collection
- Method
- Fluoroenzyme Immunoassay EliA
- Collection
- Specimen should be free of bacterial contamination, hemolysis, and lipemia.
- Reference notes
- 0.0–10.0 U/mL Negative: <7.0 Equivocal: 7.0 - 10.0 Positive: >10.0
Panels that include this biomarker
Bowel Disorders Evaluation Rule-out Cascade 164119
2 analytes · Serum · Fasting not stated · Turnaround 4 - 7 days
Labcorp catalog pageMethod and collection
- Method
- Fluoroenzyme Immunoassay EliA
- Collection
- Specimen should be free of bacterial contamination, hemolysis and lipemia.
Celiac Antibodies tTG IgA and Total IgA With Reflex to tTG IgG and DGP IgG 164047
2 analytes · Serum · Fasting not stated · Turnaround 2 - 3 days
Labcorp catalog pageMethod and collection
- Method
- IgA: Enzyme immunoassay (EIA) Tissue Transglutaminase tTG, IgA/IgG: Fluoroenzyme Immunoassay EliA Deamidated Gliadin Abs, IgG: Fluoroenzyme Immunoassay EliA
Celiac Antibodies tTG IgA/DGP IgG Combination Screen 164107
2 analytes · Serum · Fasting not stated · Turnaround 2 - 5 days
Labcorp catalog pageMethod and collection
- Method
- Fluoroenzyme Immunoassay EliA
- Collection
- Specimen should be free of bacterial contamination, hemolysis and lipemia.
Gluten Sensitivity Antibodies Cascade 164113
2 analytes · Serum · Fasting not stated · Turnaround 4 - 6 days
Labcorp catalog pageMethod and collection
- Method
- Fluoroenzyme Immunoassay EliA
- Collection
- Specimen should be free of bacterial contamination, hemolysis and lipemia.
Celiac Antibodies tTG IgA, DGP IgA, Total IgA With Reflex to tTG IgG and DGP IgG 164002
3 analytes · Serum · Fasting not stated · Turnaround 2 - 4 days
Labcorp catalog pageMethod and collection
- Method
- IgA: Enzyme immunoassay (EIA) Tissue Transglutaminase tTG, IgA/IgG: Fluoroenzyme Immunoassay EliA Deamidated Gliadin Abs, IgA/IgG: Fluoroenzyme Immunoassay EliA
Quest Diagnostics 2 tests
Single-analyte tests
Tissue Transglutaminase (tTG) Antibody (IgA) 8821
Serum · Fasting not stated · Turnaround Set up: Mon-Fri; Report available: 5 days
Quest Diagnostics catalog pageMethod and collection
- Method
- Immunoassay (IA)
- Reference notes
- <15.0 U/mL Antibody not detected ≥15.0 U/mL Antibody detected
Panels that include this biomarker
Tissue Transglutaminase (tTG) Antibodies (IgG, IgA) 11073
2 analytes · Serum · Fasting not stated
Quest Diagnostics catalog pageMethod and collection
- Method
- Immunoassay (IA)
- Reference notes
- Tissue Transglutaminase Antibody, IgG <15.0 U/mL Antibody not detected ≥15.0 U/mL Antibody detected Tissue Transglutaminase Antibody, IgA <15.0 U/mL Antibody not detected ≥15.0 U/mL Antibody detected
0 of 5 tests selected
Pick one moreGoals and conditions
We link t-Transglutaminase (tTG) IgA to these goals and conditions from named guidelines and studies.
Energy and fatigueGoal, primary marker
NICE lists coeliac screening among the tests to exclude other diagnoses when ME/CFS is suspected.
Celiac diseaseCondition, ICD-10 K90.0, primary marker
The ACG guideline names tissue transglutaminase IgA as the serologic test for celiac disease.
Sources
9 tests: codes, specimens, methods, preparation and reference intervals.
Quest Diagnostics test catalog
2 tests: codes, specimens, methods, preparation and reference intervals.
Clinical guideline: Celiac disease (primary)
Clinical guideline: Energy and fatigue (primary)
Labcorp test menu, Tissue Transglutaminase (tTG) IgA (164640), 2026
Laboratory catalog: Range: Labcorp, all ages
MedlinePlus, National Library of Medicine
The description at the top of this page.
LOINC 31017-7
Regenstrief Institute codes that identify the same result across labs.
Search ClinicalTrials.gov for t-Transglutaminase (tTG) IgA
Registered studies that measure t-Transglutaminase (tTG) IgA, on the U.S. National Library of Medicine registry.
Verify these ranges and sources
We compile this page from named laboratory catalogs, guidelines and studies. Labs calculate reference intervals from the people they test, for one assay method and one population group, so an interval describes that population rather than an optimal target.
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