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Labcorp Oklahoma, Inc.
Test Directory


Index:

Celiac Disease Analyzer

Order Name CELIAC AN
Test Number: 5537700
Revision Date 04/03/2024
Test Name Methodology LOINC Code
Tissue Transglutaminase IgA (IgA anti-tTG)
Chemiluminescence Assay 46128-5 
Gliadin Deamidated Antibody, IgA
Chemiluminescence Assay 63453-5 
Gliadin Deamidated Antibody, IgG
Chemiluminescence Assay 63459-2 
Immunoglobulin IgA Quantitative
Turbidometric 2458-8 
SPECIMEN REQUIREMENTS
Specimen Specimen Volume (min) Specimen Type Specimen Container Transport Environment
Preferred 4 mL (2) Serum Clot Activator SST Refrigerated
Instructions Allow specimen to clot completely at room temperature. Separate serum from cells ASAP or within 2 hours of collection.
Stability After separation from cells: Ambient 8 hours, Refrigerated 2 days, Frozen 30 days (avoid repeated freeze/thaw cycles).
GENERAL INFORMATION
Testing Schedule Mon, Wed, Fri 
Expected TAT 5-7 Days  
Clinical Use Assist the diagnosis of Celiac disease and the monitoring of compliance to diet. This test will automatically reflex for a IgG Anti-Tissue Transglutaminase antibody if the Celiac suspected patient is identified as being deficient for total serum IgA. 
CPT Code(s)

Initial Testing

Test Name CPT Codes
IgA Anti-Tissue Transglutaminase Antibody 86364
Deamidated Gliadin IgA 86258
Deamidated Gliadin IgG 86258
Total IgA 82784
 

Possible Additional Testing

Test Name CPT Codes
IgG Anti-Tissue Transglutaminase Antibody 83516
Lab Section Immunology - Serology