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Specimen Collection Manual and Test Catalog

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TISSUE TRANSGLUTAMINASE IGG AB

Geisinger Epic Procedure Code:  LAB3164    Geisinger Epic ID:  45704

SPECIMEN COLLECTION
Specimen type: 

Serum


Preferred collection container: 
Alternate collection container: 
6 mL red-top (plain, non-serum separator) tube
Specimen required: 

1 mL serum; minimum 0.5 mL



SPECIMEN PROCESSING
Processing instructions: 

Centrifuge serum specimens within 1 hour of collection. Transfer serum to sterile, plastic, screw-capped vial.


Transport temperature: 

Refrigerated.


Specimen stability: 

Room temperature: 7 days. Refrigerated: 14 days. Frozen: 30 days.


Rejection criteria: 

Grossly hemolysis. Lipemia.



TEST DETAILS
Reference interval: 

Negative <7 U/mL


Interpretation guide: 

Negative <7 U/mL 
Equivocal 7-10 U/mL 
Positive >10 U/mL


CPT code(s):  86364
Note: The billing party has sole responsibility for CPT coding.  Any questions regarding coding should be directed to the payer being billed.
The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only.

Test includes: 

Tissue Transglutaminase Antibody, IgG.


Methodology: 
Enzyme Immunoassay (EIA)
Synonyms: 

TTGIGG, Celiac


Clinical significance: 

Tissue Transglutaminase Antibody, IgG, is useful in diagnosing gluten-sensitive enteropathies, such as Celiac Sprue Disease, and an associated skin condition, dermatitis herpetiformis in patients who are IgA-deficient.


Doctoral Director(s): 
Benjamin Andress, PhD, DABCC
Hoi-Ying Elsie Yu, PhD, DABCC, FADLM
Review Date:  12/10/2024

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