IMMUNOGLOBULIN G (IgG), SUBCLASS 4

Specimen Required
Draw blood in a SST. Centrifuge, separate and send 1.0 mL serum (0.5 mL minimum) refrigerated in a screw-capped plastic vial.

Alternate Specimen
Red-top

Rejection Criteria
Lipemia

Methodology
Turbidimetric

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

Reference Range
0-2 yrs:   1-78 mg/dL  
2-4 yrs:   1-54 mg/dL  
4-6 yrs:   2-113 mg/dL  
6-8 yrs:   1-99 mg/dL  
8-10 yrs:   2-93 mg/dL  
10-12 yrs:   2-115 mg/dL  
12-14 yrs:   4-136 mg/dL  
14-18 yrs:   11-157 mg/dL  
>18 yrs:   4-86 mg/dL  

Performed
Monday-Friday

Turnaround Time3 days
Test CodeIGG4
CPT-4 Code (s)
82787
LOINC Codes
2469-5

Warde
Medical
Laboratory