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Test Code IGGS4 Immunoglobulin Subclass IgG4, Serum

Reporting Name

Immunoglobulin Subclass IgG4, S

Useful For

Supporting the diagnosis of IgG4-related disease

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

Serum


Ordering Guidance


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) Performed

Monday through Friday

Test Classification

This test has been cleared, approved, or is exempt by the US 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

Report Available

1 to 2 days

Reject Due To

Gross hemolysis OK
Gross lipemia Reject
Gross icterus OK

Method Name

Nephelometry

Secondary ID

84250