Methodology
Flow Cytometry (FC)
Specimen Type
Whole Blood
Performing Lab
Quest Diagnostics San Juan Capistrano
Epic ID
LAB01272
Lab Test Days
Daily
Standard TAT
2-3 Days
Collection Information
Specimen Required
0.5-5 mL Whole Blood
Container Type
EDTA (Lavender-Top) Tube
Processing Information - Lab Use Only
Transport Temperature
Ambient-Only
Specimen Stability
Room Temp: 72 Hours; Refrigerated: Unacceptable; Frozen: Unacceptable
Rejection Criteria
Hemolysis; Lithium heparin (green-top) tube; ACD (yellow-top) tube; Clotted
Test Volume Required
5 mL Whole Blood
Minimum Test Volume
0.5 mL Whole Blood
Processing Instructions
ALL specimens for this test need to be packaged and submitted to Quest in a Hematopathology Specimen Transport box.
Included Tests
% CD4, Absolute CD4 Cells, % CD8, Absolute CD8 Cells, CD4/CD8 Ratio and Absolute Lymphocytes.
CPT Codes
86360
Revised
9/24/25
Initials
SA