Patient Preparation

 

Collect

Serum separator tube.  

Specimen Preparation

Separate serum from cells ASAP or within 2 hours of collection. Transfer 2 mL serum to an ARUP Standard Transport Tube. (Min: 1 mL)  

Storage/Transport Temperature

Refrigerated.  

Unacceptable Conditions

Plasma. Contaminated, hemolyzed, grossly icteric or grossly lipemic specimens.  

Remarks

 

Stability

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

Effective February 16, 2016

Test Number	Components	Reference Interval
0050340	Immunoglobulin A	Effective February 16, 2016 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: 68-408 mg/dL
0051689	Celiac Disease Dual Antigen Screen	19 Units or less: Negative - No significant level of detectable IgA or IgG antibodies against human tissue transglutaminase or gliadin peptide. 20 Units or greater: Positive - Presence of IgA and/or IgG antibodies against human tissue transglutaminase and/or gliadin peptide; suggests possibility of certain gluten sensitive enteropathies such as celiac disease and dermatitis herpetiformis.
0051357	Deamidated Gliadin Peptide (DGP) Antibody, IgA	19 Units or less: Negative 20-30 Units: Weak Positive 31 Units or greater: Positive
0051359	Deamidated Gliadin Peptide (DGP) Antibody, IgG	19 Units or less: Negative 20-30 Units: Weak Positive 31 Units or greater: Positive
0097709	Tissue Transglutaminase (tTG) Antibody, IgA	3 U/mL or less: Negative 4-10 U/mL: Weak Positive 11 U/mL or greater: Positive
0050736	Endomysial Antibody, IgA by IFA	Less than 1:10
0056009	Tissue Transglutaminase Antibody, IgG	5 U/mL or less: Negative 6-9 U/mL: Weak Positive 10 U/mL or greater: Positive

Refer to report.

The Celiac Disease Reflexive Cascade begins with Immunoglobulin A. Depending on findings, one or more reflexive tests may be required in order to provide a clinical interpretation. Tests added may include Tissue Transglutaminase Antibody, IgA; Tissue Transglutaminase Antibody, IgG; Endomysial Antibody, IgA by IFA; Deamidated Gliadin Peptide (DGP) Antibody, IgA; Deamidated Glaidin Peptide (DGP) Antibody, IgG; and/or Celiac Disease Dual Antigen Screen. Refer to the Celiac Testing Algorithm found at http://www.arupconsult.com/Algorithms/CeliacDz.pdf. Additional charges apply.

82784; if reflexed additional CPT codes may apply: 83516, 83516 x2 and/or 86256.
add 83516; if reflexed to tTG IgA and Gliadin IgA, add 83516 x 2; if reflexed to tTG IgG and Gliadin IgG, add 83516 x2.; if IgA is greater than or equal to the normal age range, add 83516; if reflexed, add 86256 and 83516.

Component Test Code*	Component Chart Name	LOINC
0050340	Immunoglobulin A	2458-8

* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.