Interleukin-2 Receptor Alpha Chain (IL-2Ra/CD25), Soluble

Test Code

INTLEUK-2

Quest Code

34298

Alias/See Also

IL-2

CPT Codes
83520

Preferred Specimen

1 mL frozen serum collected in a red-top tube (no gel)

Minimum Volume

0.5 mL

Instructions

IL-2R levels may demonstrate diurnal variation. Recommend IL-2R levels be determined at the same time of day for improved longitudinal comparison.
No biotin supplements 48 hours prior to blood draw.

Transport Temperature

Frozen

Specimen Stability

Room temperature: Unacceptable
Refrigerated: 24 hours
Frozen: 30 days

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

Serum Separator Tube (SST) • Plasma • Received room temperature • Received refrigerated

Methodology
Immunoassay (IA)

FDA Status
This test was performed using a kit that has not been cleared or approved by the FDA. The analytical performance characteristics of this test have been determined by Quest Diagnostics. This test should not be used for diagnosis without confirmation by other medically established means.

Setup Schedule

Night Sets up 1 day a week.

Report Available

1-9 days

Reference Range

532-1891 pg/mL

Clinical Significance

Following stimulation by antigen, IL-2R is expressed on all T cells. IL-2R is released by activated cells into the surrounding extracellular fluid. IL2-R is involved in infectious, inflammatory and autoimmune diseases, cancer, and transplantation. IL-2R Antibodies are used therapeutically.

Performing Laboratory
Quest Diagnostics Nichols Institute
33608 Ortega Highway
San Juan Capistrano, CA 92690-6130

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.