ARUP's Laboratory Test Directory

0051065: Celiac Disease Reflexive Panel

Test Mnemonic: CELIAC TTG
Methodology: Nephelometry/Indirect Fluorescent Antibody/Enzyme-Linked Immunosorbent Assay

Performed: Sun-Sat

Reported: 2-5 days

Specimen Required:  
Collect: One 4 mL SST. Specify age of patient on test request form.

Transport: 2 mL serum at 2-8°C.  Submit specimen in an ARUP Standard Transport Tube.

Pediatric Collection/Transport: 1 mL serum at 2-8°C.

Remarks: Separate serum from cells ASAP.

Unacceptable Conditions: Plasma. Hemolyzed, grossly lipemic or contaminated specimens.

Stability: After separation from cells: Ambient: 8 hours; Refrigerated: 8 days; Frozen: 1 year (if frozen within 24 hours)

Reference Interval:
 
Test Number Components Reference Interval
0050340Immunoglobulin A, Serum  
 
0-30 days: 1-7 mg/dL
1 month: 1-53 mg/dL
2 months: 3-47 mg/dL
3 months: 5-46 mg/dL
4 months: 4-72 mg/dL
5 months: 8-83 mg/dL
6 months: 8-67 mg/dL
7-8 months: 11-89 mg/dL 		9-11 months: 16-83 mg/dL
1 year: 14-105 mg/dL
2 years: 14-122 mg/dL
3 years: 22-157 mg/dL
4 years: 25-152 mg/dL
5-7 years: 33-200 mg/dL
8-9 years: 45-234 mg/dL
10 years and older: 68-378 mg/dL
0097709Tissue Transglutaminase Antibody, IgA 19 Units or less
0056009Tissue Transglutaminase Antibody, IgG < 20 EU: None Detected
20-30 EU: Weakly Positive
> 30 EU: Positive
0051357Gliadin Peptide Antibody, IgA 19 Units or less: Negative
20-30 Units: Weak Positive
31 Units or greater: Positive
0051359Gliadin Peptide Antibody, IgG 19 Units or less: Negative
20-30 Units: Weak Positive
31 Units or greater: Positive

Interpretive Data:
Refer to individual components.



Note:
If IgA < 7 mg/dL, then tTG IgG will be added. If tTG IgG is < 20 U and patient is < 3 years of age, then Gliadin Peptide IgG & IgA will be added.
If IgA is greater than or equal to 7 mg/dL, then tTG IgA will be added. If tTG IgA is negative and patient is < 3 years of age, then Gliadin Peptide IgG & IgA will be added.

CPT Code(s):
82784 IgA; if < 7 mg/dL, add 83516 tTG IgG; if negative and patient is < 3 years of age, add 83516 x2 Gliadin IgG & IgA.  If IgA is greater than or equal to 7, add 83516  tTG IgA; if negative and patient is < 3 years of age, add 83516 x2 Gliadin IgG & IgA

 

 

 
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