CD57, CD3, CD8, Flow Cytometry [19860]

For Specimen Integrity during Extreme Weather see the “Lockbox Usage in Extreme Weather” document at the top of this page.

Test Code

Alias/See Also

CPT Codes
86359, 86356 (x2)<br><strong>This test is not available for New York patient testing.</strong>

Preferred Specimen
5 mL whole blood collected in an EDTA (lavender-top) tube

Minimum Volume
3 mL • 0.5 mL pediatric

Other Acceptable Specimens
1 mL whole blood collected in a pediatric EDTA (lavender-top) tube

Absolute count results provided with this test code require a CBC to be performed. The stability for the CBC is 48 hours. Please provide a CBC collected the same day as the submitted specimen, if it is anticipated the sample will not reach the laboratory within 48 hours. 

Transport Temperature
Room temperature

Specimen Stability
Room temperature: 72 hours
Refrigerated: Unacceptable
Frozen: Unacceptable

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

Flow Cytometry (FC)

FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Setup Schedule
Set up: Mon-Sat; Report available: 2-3 days

Reference Range
CD57+/CD3- of % lymphs 1-10 %
CD57+/CD3- of % WBC 1-4 %
CD57+/CD3- absolute 20-258 cells/uL
CD57+/CD3-/CD8- of % lymphs 1-5 %
CD57+/CD3-/CD8- of % WBC 1-3 %
CD57+/CD3-/CD8- absolute 20-114 cells/uL
CD57+/CD8- of % lymphs 1-15 %
CD57+/CD8- of % WBC 1-4 %
CD57+/CD8- absolute 20-248 cells/uL

Performing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153

Last Updated: November 29, 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.