Geisinger Medical Laboratories/Geisinger Proven Diagnostics Test Catalog

Test Name: Sunquest Test Code Epic Procedure Code Or ID CPT Code:  

TISSUE TRANSGLUTAMINASE IGA AB

ORDERING INFORMATION:
Sunquest Test Code:
TTG      Geisinger Epic Procedure Code: TTG         Geisinger Epic ID: 18314

SPECIMEN COLLECTION
Specimen type:
Serum
Preferred collection container:
Alternate Collection Container:
6 mL red-top (plain, non-serum separator) tube
Specimen required:
0.5 mL serum; minimum 0.2 mL

SPECIMEN PROCESSING
Specimen processing instructions:
Allow to clot. Centrifuge and submit 0.5 mL serum. 
Transport temperature:
Refrigerated (preferred). Room temperature (stable 8 hours) and frozen specimens also acceptable.
Specimen stability:
Room temperature: 8 hours. 2-8°C: 96 hours. Frozen: 6 months.
Rejection criteria:
Specimen stability exceeded; specimen grossly hemolyzed.

TEST DETAILS
Interpretation guide:
Negative: < 20.0 UNITS
Weak Positive: 20.0-30.0 UNITS
Moderate to Strong Positive: > 30.0 UNITS
CPT code(s):
83520
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:
Antibody detection to TTG IgA.
Methodology:
Enzyme-Linked Immunosorbent Assay (ELISA)
Synonyms:
Tissue Transglutaminase Antibody IgA
T Transglutaminase Ab IgA
Clinical significance:
Antibodies to tissue transglutaminase (TTG) can be used to aid in the diagnosis of certain gluten-sensitive enteropathies such as celiac disease and dermatitis herpetiformis. This assay can also be used to check for adherence to a gluten-free diet in patients already diagnosed with celiac disease.
Doctoral Director(s:)
Stacy Kenyon, PhD, DABCC
Hoi-Ying Elsie Yu, PhD, DABCC    
Review Date: 10/31/2018

Performing Locations

Geisinger Medical Center

Performing laboratory: Immunology
Technical Lead: Kathy Hurst
Frequency: Monday-Friday, 1st shift.
Performed stat? No
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