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Test Code TTGA Tissue Transglutaminase (TTG) IgA, Serum

Additional Codes

  • Expanse Test Name: TTG IgA,S
  • Medinet Ref Code:TTGA
  • OV Code:CHEM*TTGA

Reference Values

Negative = <4 U/mL

Weak Positive = 4-10 U/mL

Positive = >10 U/mL

The results obtained with Werfen QUANTA Lite R h-tTG IgA 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

86364

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 disorder, positivity for HLA DQ2 and DQ8).

 

Screening test for dermatitis herpetiformis, in conjunction with endomysial antibody test.

 

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