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HelpOrderable Name IGGS4 IgG4, Immunoglobulin Subclasses, Serum
Useful For
Supporting the diagnosis of IgG4-related disease
Specimen Type
SerumOrdering Guidance
This test only quantitates the IgG4 protein. If quantitation of all IgG subclass types is desired, order IGGS / IgG Subclasses, Serum.
Specimen Required
Patient Preparation: Fasting preferred but not required
Collection Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Submission Container/Tube: Plastic vial
Specimen Volume: 1 mL
Collection Instructions: Centrifuge and aliquot serum into a plastic vial.
Specimen Minimum Volume
0.5 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum | Refrigerated (preferred) | 14 days | |
| Ambient | 14 days | ||
| Frozen | 14 days |
Reference Values
0-<5 months: ≤19.8 mg/dL
5-<9 months: ≤20.8 mg/dL
9-<15 months: ≤22.0 mg/dL
15-<24 months: ≤23.0 mg/dL
2-<4 years: ≤49.1 mg/dL
4-<7 years: ≤81.9 mg/dL
7-<10 years: 1.0-108.7 mg/dL
10-<13 years: 1.0-121.9 mg/dL
13-<16 years: ≤121.7 mg/dL
16-<18 years: ≤111.0 mg/dL
≥18 years: 2.4-121.0 mg/dL
Day(s) Performed
Monday through Friday
CPT Code Information
82787
Report Available
1 to 2 daysReject Due To
| Gross hemolysis | Reject |
| Gross lipemia | Reject |
| Gross icterus | OK |
Method Name
Turbidimetry