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Labcorp Oklahoma, Inc.
Test Directory


Lymphocyte Absolute CD4 Count

Order Name T Helper
Test Number: 3654600
Revision Date 05/24/2023
Test Name Methodology LOINC Code
Lymphocyte Absolute CD4 Count
Flow cytometry  
Specimen Specimen Volume (min) Specimen Type Specimen Container Transport Environment
Preferred 5 mL each (3 mL each) Whole Blood EDTA (Lavender) and ACD Sol A/B (Yellow Top) Room Temperature
Instructions Collect Whole blood in Both ACD Solution A or B (Yellow Top) and EDTA (Lavender Top).
Keep whole blood, do not centrifuge or refrigerate.
Deliver to the laboratory ASAP - Same Day as Collection!
Collect Monday through Wednesday only. Specimens must be received at Labcorp Oklahoma Inc. by Wednesday afternoon or collect on Monday.
Testing Schedule Testing schedule may vary. 
Expected TAT 3-5 days  
Clinical Use Marker for level of immunocompetence. The T4 Lymphocytes reports out values for Lymphocyte Percent CD4 and Lymphocyte Absolute CD4 
Performing Labcorp Test Code 505008 
CPT Code(s) 86361
Lab Section Reference Lab