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

Message
Specimen Requirement: Red topCentrifuge and transfer serum to a plastic screw-cap tube prior to transportation. Ambulatory Transport Temp (to ICL): Frozen (serum)Specimen Stability: 30 days


Test Code
LAB3551 INTER


Alias/See Also
INTER


CPT Codes
83520

Includes
IL-2R levels may demonstrate diurnal variation. Recommend IL-2R levels be determined at the same time of day for improved longitudinal comparison.@BKRCERMSGREFRESH(2302793)@ @BKRCERMSGREFRESH(2302794)@


Instructions
Preferred Volume: 1 mL serumMinimum Volume: 0.5 mL serum Transport Temperature: Frozen Stability: Ambient: UnacceptableRefrigerated : 24 hoursFrozen: 30 days Causes for Rejection: Serum separator tube (SST)PlasmaPerforming Lab: Quest SJC


Report Available
21-Days


Clinical Significance
1230171371



Last Updated: May 18, 2026


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.