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Specimen Collection Manual and Test Catalog

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IGA

Geisinger Epic Procedure Code:  LAB2512    Geisinger Epic ID:  15025

SPECIMEN COLLECTION
Specimen type: 

Plasma or serum


Preferred collection container: 
Specimen required: 

2 mL serum or plasma; minimum 0.2 mL.


Patient preparation: 

Fasting specimen preferred.



SPECIMEN PROCESSING
Processing instructions: 

Allow serum to clot. Centrifuge to separate serum or plasma within 2 hours of collection.


Transport temperature: 

Refrigerated (preferred). Room temperature or frozen specimen also acceptable.


Specimen stability: 

Room temperature: 8 months. Refrigerated: 8 months. Frozen: 8 months.


Rejection criteria: 

Stability limits exceeded.



TEST DETAILS
Reference interval: 

< 1 year: 0-83 mg/dL 
1 - < 4 years: 20-100 mg/dL 
4 - < 7 years: 27-195 mg/dL 
7 - <10 years: 34-305 mg/dL 
10 - <19 years: 58-348 mg/dL 
19 years and up: 70-400 mg/dL


CPT code(s):  82784
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: 

IgA quantitation.


Methodology: 
Immunoturbidity
Synonyms: 

Immunoglobulin A


Clinical significance: 

Increased IgA is associated with monoclonal IgA myeloma, respiratory and gastrointestinal infections, and malabsorption. Decreased IgA is found in selective IgA deficiency and in ataxia telangiectasia.


Doctoral Director(s): 
Hoi-Ying Elsie Yu, PhD, DABCC, FADLM
Sheng-Ying (Margaret) Lo, PhD, DABCC
Review Date:  12/27/2024

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