Test Code IGGS4 Immunoglobulin Subclass IgG4, Serum
Reporting Name
Immunoglobulin Subclass IgG4, SUseful For
Supporting the diagnosis of IgG4-related disease
Performing Laboratory

Specimen Type
SerumAdvisory Information
This test only quantitates the IgG4 protein. If quantitation of all IgG subclass types is wanted, order IGGS / IgG Subclasses, Serum.
Specimen Required
Patient Preparation: Fasting preferred but not required
Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Specimen Volume: 1 mL
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: 0.4-49.1 mg/dL
4-<7 years: 0.8-81.9 mg/dL
7-<10 years: 1.0-108.7 mg/dL
10-<13 years: 1.0-121.9 mg/dL
13-<16 years: 0.7-121.7 mg/dL
16-<18 years: 0.3-111.0 mg/dL
≥18 years: 2.4-121.0 mg/dL
Day(s) and Time(s) Performed
Monday through Friday; Continuously
Test Classification
This test has been cleared, approved or is exempt by the U.S. Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.CPT Code Information
82787
LOINC Code Information
Test ID | Test Order Name | Order LOINC Value |
---|---|---|
IGGS4 | Immunoglobulin Subclass IgG4, S | 2469-5 |
Result ID | Test Result Name | Result LOINC Value |
---|---|---|
IGGS4 | Immunoglobulin Subclass IgG4, S | 2469-5 |
Reject Due To
Gross hemolysis | OK |
Gross lipemia | Reject |
Gross icterus | OK |
Method Name
Nephelometry