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Specimen Collection Manual and Test Catalog

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IGG

Geisinger Epic Procedure Code:  LAB2518    Geisinger Epic ID:  15027

SPECIMEN COLLECTION
Specimen type: 

Plasma or serum


Preferred collection container: 
Specimen required: 

1 mL of 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: 4 months. Refrigerated: 8 months. Frozen: 8 months.


Rejection criteria: 

Stability limits exceeded.



TEST DETAILS
Reference interval: 

< 1 year: 232-1411 mg/dL 
1 - < 4 years: 453-1411 mg/dL 
4 - < 10 years: 504-1465 mg/dL 
10 - <14 years: 698-1560 mg/dL 
14 years and up: 700-1600 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: 

IgG quantitation.


Methodology: 
Immunoturbidity
Synonyms: 

Immunoglobulin G


Clinical significance: 

Increased IgG is associated with acute and chronic inflammations, monoclonal IgG myeloma, and automimmune diseases. Decreased IgG is found in selective IgG deficiency, Bruton's disease, and acquired immunodeficiency.


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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