Interleukin-6 (IL-6), Serum : 34473

CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.  

Test Code
INTL6 or 34473

Alias/See Also
IL-6; Cytokine

CPT Codes

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

 Serum separator tube or Plain red.

Transport Container
Centrifuge the serum separator or plain red tube and aliquot 1 mL serum into a standard transport tube. (Min: 0.5 mL)

Transport Temperature

Specimen Stability
After separation from cells: Ambient: 24 hours; Refrigerated: 48 hours; Frozen: 7 months

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Non-frozen specimens. Gross hemolysis.


Setup Schedule

Report Available
5-12 days (From receipt at performing laboratory)

This test was performed using a kit that has not been approved or cleared 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.

Reference Range
Effective 2-18-2019
< 5.00 pg/mL

Clinical Significance
To evaluate the level of IL-6 in serum samples.

Performing Laboratory
Quest Diagnostics

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.