LYMPHOCYTE SUBSET

Test Code

TBNK

CPT Codes
86359; 86355; 86357

Includes

Test Components: CD3 (total T), CD19 (total B), CD56 (total NK), Absolute Lymphocyte Count

Preferred Specimen

1 Lavender tube (EDTA)

Minimum Volume

2 mL

Instructions

Deliver specimen to laboratory ASAP

Transport Temperature

Room temperature

Specimen Stability

Room temperature up to 48 hours

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

Specimen too old for analysis or improperly stored

Methodology
Flow Cytometry

Setup Schedule

M, T, W, Th, F, Sa

Report Available

Report available within 24 hours of receipt Monday - Saturday

Report available within 48 hours of receipt Sunday and holidays

Reference Range

?CD3%	58-84
CD3 cells/uL	856-2237
CD19%	6-25
CD19 cells/uL	87-507
CD56%	4-27
CD56 cell/uL	74-562

Clinical Significance

Useful for follow-up and diagnostic evaluation of primary cellular immunodeficiencies, including severe combined immunodeficiency.

Performed By
Alverno Laboratories

Performing Laboratory
Alverno Central Lab
NMB10 (Molecular Biology, Flow)

Last Updated: June 8, 2023

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.