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Test Code IGGS4 IgG4, Immunoglobulin Subclasses, Serum

Reporting Name

IgG4, Ig Subclasses

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 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

Reject Due To

Gross hemolysis Reject
Gross lipemia Reject
Gross icterus OK

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

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 IgG4, Ig Subclasses 2469-5

 

Result ID Test Result Name Result LOINC Value
IGGS4 IgG4, Ig Subclasses 2469-5

Report Available

1 to 2 days