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Test Code TTG Tissue Transglutaminase (TTG) Panel IgA/IgG, Serum

Additional Codes

  • Expanse Test Name: TTG Pnl IgA/IgG,S
  • Medinet Ref Code:TTGp
  • OV Code:CHEM*TTG

Reference Values

TTG IgA

Negative: ≤4 U

Weak Positive: 4-10 U

Moderate to Strong Positive: >10 U

 

TTG IgG

Negative: ≤6 U

Weak Positive: 6-9 U

Moderate to Strong Positive: >9 U

 

Results obtained with this method cannot be used interchangeably with results from another testing method.  The magnitutde of the reported level cannot be correlated to an endpoint titer.

Day(s) Test Set Up

Tuesday and Thursday

Test Classification and CPT Coding

86364x2

Specimen Collection

Draw blood in a serum gel tube.  Spin down and send a mimimum of 1 mL serum refrigerated.  Specimens that will not reach the laboratory within 48 hours must be frozen.

 

Unspun specimens must be transported at ambient temperature and arrive at the laboratory within 1 hour of collection.

Useful For

Evaluating patients suspected of having celiac disease, including patients with compatible clinical symptoms, patients with atypical symptoms, and individuals at increased risk (family history, previous diagnosis with associated disease, positivity for HLA DQ2 and/or DQ8).

 

Monitoring adherence to gluten-free diet in patients with dermatitis herpetiformis and celiac disease.