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Geisinger Medical Laboratories Test Catalog
IGA SUBCLASSES |
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ORDERING INFORMATION: |
Geisinger Epic Procedure Code: LAB2513 Geisinger Epic ID: 45703 | |
SPECIMEN COLLECTION |
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Specimen type: |
Serum | |
Preferred collection container: |
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Alternate Collection Container: |
6 mL red-top (plain, non-serum separator) tube
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Specimen required: |
2 mL serum; minimum 1 mL. | |
| SPECIMEN PROCESSING |
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Specimen processing instructions: |
Centrifuge and aliquot. | |
Transport temperature: |
Refrigerated (cold packs) | |
Specimen stability: |
Room temperature: 5 hours. Refrigerated: 15 days. Frozen: 30 days. | |
Rejection criteria: |
Gross hemolysis, lipemia. | |
TEST DETAILS |
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CPT code(s): |
82784, 82787 x2 | |
| Note: The billing party has sole responsibility for CPT coding. Any questions regarding coding should be directed to the payer being billed. The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only. | ||
Test includes: |
IgA1, IgA2, Total IgA | |
Methodology: |
Immunoturbidity |
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Synonyms: |
Quest test code 34188 IGASUB
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Clinical significance: |
IgA1 constitutes approximately 80% of the circulating IgA. IgA nephropathy is typically due to IgA1. IgA2 predominates in secretions of some mucosal surfaces. IgA2 concentrations may be useful as an index of mucosal pathology. Subclass deficiency is associated with anaphylactic transfusion reactions. | |