Test Directory

Test Code
IGA
Test Name
Immunoglobulin A
CPT Codes
82784
Expected Turnaround Time
1 - 3 days
Clinical Utility
Selective IgA deficiency characterized by IgA less than 5 mg/dL with other immunoglobulins normal or increased, is associated with allergies, recurrent sinopulmonary infection, autoimmune disease, and HLAA28, B14 or A1.
Specimen and Container Info

Preferred Specimen Type: Serum

Desired Specimen Volume: 1 mL

Preferred Collection Container: Gold Top, Serum Separator

Processing and Submission Instructions

Separator tubes: Contains clot activator and gel for separating serum from cells, but not anticoagulant. Separate serum from cells as soon as the clot has formed (30 minutes). If specimen is centrifuged before clotting is complete, a fibrin clot will form on top of the cell. This may cause the gel barrier to not be intact and could cause improper separation of serum and cells, possibly affecting test results.

Transport Instructions

Transport refrigerated. 

Stability Requirements

Refrigerated

7 days

Frozen

<20°C for long-term storage.  

Freeze/Thaw Cycles

Avoid multiple freeze/thaw cycles. 

Methodology
Turbidimetric
Reference Intervals

Age

IgA mg/dL

0 - 1 year

1 - 29

1 - 3 years

4 - 90

3 - 6 years

26 - 147

6 - 14 years

47 - 221

14 - 19 years

53 - 287

Adult Male

71 - 365

Adult Female

83 - 407

 

Performing Location
Roble Road Core Laboratory
Testing Schedule
Routine, 6 times per week