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CD19, B Cells
Messagedraw Mon-Thurs only
Test Code
CD19
Quest Code
18096
CPT Codes
86355
Includes
Lymphocytes, Absolute CD19+ Cells, % CD19 (B cells)
Preferred Specimen
5 mL whole blood collected in an EDTA (lavender-top) tube
Minimum Volume
1 mL
Instructions
Maintain sample(s) at room temperature. Do not refrigerate. Recommendation: Draw sample shortly before courier pick up so it is received at the lab within 24 hours. Avoid transport just before or during weekends, which can result in preassay delay.
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 72 hours
Refrigerated: Unacceptable
Frozen: Unacceptable
Refrigerated: Unacceptable
Frozen: Unacceptable
Methodology
Flow Cytometry
Setup Schedule
Set up: Daily; Report available: 2-3 days
Reference Range
See Laboratory Report
Performing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153