IMMUNOGLOBULIN G (IgG) SUBCLASSES

Test Documentation
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

Methodology
Nephelometry

Stability
Room Temperature: Unacceptable; Refrigerated: 8 days; Frozen: 3 months

Reference Range
   IgG1 mg/dL   IgG2 mg/dL   IgG3 mg/dL   IgG4 mg/dL  
0-1 month   240-1060   87-410   14-55   4-55  
1-4 months   180-670   38-210   14-70   <3-36  
4-6 months   180-700   34-210   15-80   <3-23  
6-12 months   200-770   34-230   15-97   <3-43  
1-1.5 years   250-820   38-240   15-107   <3-62  
1.5-2 years   290-850   45-260   15-113   <3-79  
2-3 years   320-900   52-280   14-120   <3-106  
3-4 years   350-940   63-300   13-126   <3-127  
4-6 years   370-1000   72-340   13-133   <3-158  
6-9 years   400-1080   85-410   13-142   <3-189  
9-12 years   400-1150   98-480   15-149   3-210  
12-18 years   370-1280   106-610   18-163   4-230  
18-150 years   490-1140   150-640   11-85   3-201  

Performed
Monday-Friday

Turnaround Time2-3 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