IGG SUBCLASSES

Test Code

LAB1381

Quest Code

7903

CPT Codes
82784, 82787 (x4)

Includes

Immunoglobulin G Subclasses 1, 2, 3, 4
IgG (Immunoglobulin G)

Preferred Specimen

2 mL serum

Minimum Volume

1 mL

Transport Container

Transport tube

Transport Temperature

Refrigerated (cold packs)

Specimen Stability

Room temperature: 72 hours
Refrigerated: 10 days
Frozen: 30 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Gross hemolysis • Lipemia

Methodology
Immunoturbidimetric Assay

Setup Schedule

P. M. Mon-sat

Report Available

3-6 days

Reference Range

See Laboratory Report

Clinical Significance

Measurement of IgG subclasses may be helpful in the management and understanding of immunodeficiency diseases, hypersensitivity states, and conditions involving susceptibility to infection.

Performing Laboratory

Quest Diagnostics Nichols Institute-Chantilly VA

14225 Newbrook Drive

Chantilly, VA 20151-2228

Last Updated: August 13, 2021

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.