Immunoglobulin G Subclass 4

Test Code: TD_2768
CPT Code(s): 82787

$19

Test Details

Alternative Name(s)

IgG4

Test Includes

Immunoglobulin G Subclass 4

Methodology

Turbidimetry

Rejection Criteria

Gross hemolysis
Gross lipemia
Avoid repeated freeze/thaw cycles

Reference Range(s)

By Report

Specimen Requirements

Preferred Specimen

Serum Separator Tube

Minimum Volume

0.45 mL Serum

Sample Stability

8 hours room temperature
1 week refrigerated
1 month frozen

Transport Temperature

Refrigerated

Collection Instructions

Allow SST to clot in an upright position for at least 30 minutes, then centrifuge sample within 2 hours of collection. Refrigerate.

Alternative Specimen

2 mL serum from a plain red top tube. Allow sample to clot in an upright position for at least 60 minutes, then centrifuge sample and transfer serum to a plastic transport tube within 2 hours of collection. Clearly label tube as serum from a plain red top tube. Refrigerate.