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T and B Cells, Total

Message
Collect a full tube, following standard venipuncture techniques. Do not transfer whole blood to M4 preservative. Whole blood collected in ACD or sodium heparin (green-top) tube is not acceptable. Volumes less than 1 mL should be submitted in a pediatric EDTA tube. Submit the EDTA tube(s) at room temperature. Do not refrigerate or freeze. It is recommended that the sample be drawn shortly before courier pick up and be received within 24 hours.


Test Code
LAB3371 TBCLT


Alias/See Also
TBCLT


CPT Codes
86355| 86359

Includes
@BKRCERMSGREFRESH(2302793)@ @BKRCERMSGREFRESH(2302794)@


Instructions
Minimum Testing Volume: 0.5 mL Transport Temperature: Ambient Stability: Ambient: 72 hoursRefrigerated : N/A Frozen: N/A Causes for Rejection: ACD (yellow-top) tube Sodium heparin (green-top) tube


Report Available
3-Days


Clinical Significance
1230170699



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.