Specimen Collection Manual and Test Catalog
TISSUE TRANSGLUTAMINASE ANTIBODY (IGG,IGA)
Geisinger Epic Procedure Code: LAB3165 Geisinger Epic ID: 45699SPECIMEN 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 and aliquot.
Transport temperature:
Refrigerated.
Specimen stability:
Room temperature: 7 days. Refrigerated: 14 days. Frozen: 30 days.
Rejection criteria:
Grossly hemolyzed or lipemic samples.
TEST DETAILS
Reference interval:
Negative <7 U/mL
Interpretation guide:
CPT code(s):
86364 x2 Negative <7 U/mL
Equivocal 7-10 U/mL
Positive >10 U/mL
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.
The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only.
Test includes:
tTG IgA and IgG Antibodies
Methodology:
Enzyme Immunoassay (EIA)
Synonyms:
TTGAG, Celiac
Clinical significance:
Tissue Transglutaminase Antibody, IgA, is useful in diagnosing gluten-sensitive enteropathies, such as Celiac Sprue Disease, and an associated skin condition, dermatitis herpetiformis. The IgG test is useful in patients who are IgA-deficient.
Doctoral Director(s):
Review Date:
01/14/2025
Benjamin Andress, PhD, DABCC
Hoi-Ying Elsie Yu, PhD, DABCC, FADLM
Hoi-Ying Elsie Yu, PhD, DABCC, FADLM
Performing Locations