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HelpTest Code LAB0208014 Celiac Disease Serology Cascade, Serum
Methodology
EliA
Useful for evaluating patients suspected of having celiac disease, including patients with compatible symptoms, patients with atypical symptoms, and individuals at increased risk .
Test includes IgA, tissue transglutaminase (tTg) IgG antibody,tissue transglutaminase (tTg) IgA antibody, gliadin (deamidated) IgG antibody, and gliadin (deamidated) IgA antibody.
Performing Laboratory
CentraCare Laboratory Services
Specimen Requirements
Specimen Type: Serum
Container/Tube:
Preferred: Serum gel or red top
Specimen Volume: 2.5 mL
Specimen Transport Temperature
Refrigerated ( serum removed within 8 hours and testing will be performed in less than 48 hours).
Frozen if testing will not be completed within 48 hours
Reference Values
IGA:
0-3 months: 1-34 mg/dl
>3 months - 1 year: 8-91 mg/dl
>1 year - 12 years: 21-291 mg/dl
>12 years - 60 years: 63-484 mg/dl
>60 years: 101 - 645 mg/dl
Gliadin (Deamidated) Antibodies IgG and IA:
Negative: (<7 U/ml)
Equivocal: (7-10 U/ml)
Positive: (.10 U/ml
Tissue Transglutaminase (tTG) Antibody IgG and IgA
Negative: (<7 U/ml)
Equivocal: (7-10 U/ml)
Positive: (>10 U/ml)
Day(s) Test Set Up
Monday, Wednesday, Friday
Test Classification and CPT Coding
83516 Tissue Transglutaminase IgG
83516 Tissue Transglutaminase IgA
83516 Gliadin Deamidated Antibody IgG
83516 Gliadin Deamidated Antibody IgA
82784 IgA