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Labcorp Oklahoma, Inc.
Test Directory


B and T Lymphocyte Plus NK Quant by Flow

Order Name Flow ImmPheno NK
Test Number: 5582615
Revision Date 05/24/2023
Test Name Methodology LOINC Code
B and T Lymphocyte Plus NK Quant by Flow
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 Expected TAT, 3-5 days,  
Clinical Use This test is also known as: Lymphocyte Plus NK Quant by Flow or Flow Immunophenotype Panel.
This is a semi-quantitative assay that measures both the relative and absolute numbers of B cells, T cells, and NK cells in the peripheral blood, which may be useful in the initial evaluation of patients with suspected immunodeficiency. 
Performing Labcorp Test Code 505370 
CPT Code(s) 86355; 86357; 86359; 86360
Lab Section Reference Lab