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Test Code BLOD0613 Immunoglobulin A (IgA)

Useful For

Detecting increased or decreased levels of Immunoglobulin A.  IgA values are decreased in immune deficiency states, infancy, non-IgA myelomas, and protein-losing conditions. IgA values are increased in chronic infections, chronic liver disease, cirrhosis, and myeloma.



Performing Laboratory

Bozeman Health Laboratory Services

Specimen Requirements

Specimen Type: Plasma or serum
Container/Tube: Light-green top (lithium heparin gel), dark-green top (sodium heparin), red top, or gold top
Specimen Volume: 1 mL
Specimen Minimum Volume: 0.5 mL

Collection Instructions:

1. Label specimen as plasma or serum.

2. Avoid hemolysis and lipemia.

Specimen Transport Temperature


Specimen Stability


Specimen Type Temperature Time
Plasma or Serum Refrigerated 7 days
  Frozen 3 months


Additional Information

If specimen must be frozen for stability, freeze within 24 hours of draw.

Reference Values

Adults: 70-400 mg/dL


During childhood and adolescence, reference ranges for IgA are dependent on age and can vary over a wide range:


Age Reference Values
0-4 months 8-64 mg/dL
4 months-8 months 10-87 mg/dL
8 months-14 months 17-94 mg/dL
14 months-2 years 22-178 mg/dL
2 years-3 years

24-192 mg/dL

3 years-6 years 26-232 mg/dL
6 years-9 years 33-258 mg/dL
9 years-12 years 45-285 mg/dL
12 years-15 years 47-317 mg/dL
15 years-17 years 55-377 mg/dL
≥ 17 years 70-400 mg/dL


Day(s) Test Set Up

Monday through Sunday

Test Classification and CPT Coding