IMMUNOGLOBULIN G (IgG) SUBCLASSES

Components
Includes IgG1, IgG2, IgG3, IgG4

Specimen Required
Draw blood in a SST. Centrifuge, separate and send 2.0 mL serum (0.5 mL minimum) refrigerated in a screw-capped plastic vial.

Alternate Specimen
Serum: Red-top

Rejection Criteria
Lipemia

Methodology
Turbidity

Stability
Room Temperature: Unacceptable; Refrigerated: 3 days; Frozen: 2 weeks

Reference Range
Years:   IgG1 mg/dL   IgG2 mg/dL   IgG3 mg/dL   IgG4 mg/dL  
0-2   194-842   23-300   19-85   1-78  
2-4   315-945   36-225   17-68   1-54  
4-6   306-945   61-345   10-122   2-113  
6-8   28-918   44-375   16-85   1-99  
8-10   432-1020   72-430   3-85   2-93  
10-12   423-1060   76-355   17-173   2-115  
12-14   342-1150   100-455   28-125   4-136  
14-18   315-855   64-495   23-196   11-157  
>18   382-929   242-700   22-176   3-165  

Performed
Monday-Friday

Turnaround Time3 days
Test CodeIGSUB
CPT-4 Code (s)
82787 x 4
LOINC Codes
IgG1   2466-1  
IgG2   2467-9  
IgG3   2468-7  
IgG4   2469-5  

Warde
Medical
Laboratory