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HelpTest Code LAB71 Immunoglobulin G (IgG)
Useful For
The detection of increased or decreased Immunoglobulin G values. IgG values are decreased in immune deficiency states, non-IgG myelomas and protein-losing conditions. IgG values are increased in systemic lupus erythematosis, chronic liver diseases (infectious hepatitis and Laennec’s cirrhosis), infectious diseases, cystic fibrosis and IgG‑myeloma.
Methodology
Immunoturbidimetric
Performing Laboratory
Bozeman Health Laboratory Services
Specimen Requirements
Specimen Type: Plasma or serum
Container/Tube: Light-green top (lithium heparin gel), red top, or gold top
Specimen Volume: 1 mL
Specimen Minimum Volume: 0.5 mL
Specimen Transport Temperature
Ambient/Refrigerated
Specimen Stability
| Specimen Type | Temperature | Time |
|---|---|---|
| Plasma or Serum | Ambient | 4 months |
| Refrigerated | 8 months | |
| Frozen | 8 months |
Additional Information
If specimen must be frozen for stability, freeze within 24 hours of draw.
Reference Values
Adults: 600-1500 mg/dL
During childhood and adolescence, reference ranges for IgG are dependent on age and can vary over a wide range:
| Age | IgG mg/dL |
|---|---|
| 0-4 months | 141-930 mg/dL |
| 4 months-8 months | 250-1190 mg/dL |
| 8 months-1 year | 320-1250 mg/dL |
| 1 year-3 years | 400-1250 mg/dL |
| 3 years-6 years | 560-1307 mg/dL |
| 6 years-9 years | 598-1379 mg/dL |
| 9 years-12 years | 638-1453 mg/dL |
| 12 years-15 years | 680-1531 mg/dL |
| 15 years-17 years | 724-1611 mg/dL |
| ≥ 17 years | 600-1500 mg/dL |
Day(s) Test Set Up
Monday through Sunday
Test Classification and CPT Coding
82784