Lymphocyte Subset Panel

Test Code

LYMPHSP

Quest Code

36420

Alias/See Also

CD4/CD8 Ratio
36420
CD3
096917 (LabCorp)

CPT Codes
86355, 86359, 86360<br>This test is for non-New York patient testing. For New York patient testing use test code 17329.

Includes

% CD3 (Mature T Cells), Absolute CD3+ Cells, % CD4, Absolute CD4+ Cells, % CD8, Absolute CD8+ Cells, CD4/CD8 Ratio, % CD19 (B Cells), Absolute CD19+ Cells, Absolute Lymphocytes

Preferred Specimen

5 mL whole blood collected in a n EDTA (lavender-top) tube

Minimum Volume

0.5 mL

Instructions

Maintain the specimen at ambient temperature. Do not refrigerate.
It is recommended that the sample be drawn shortly before courier pick up and be received within 24 hours.

Transport Temperature

Room temperature

Specimen Stability

Room temperature: 72 hours
Refrigerated: Unacceptable
Frozen: Unacceptable

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

Hemolysis • Lithium heparin (green-top) tube • ACD (yellow-top) tube • Clotted

Methodology
Flow Cytometry (FC)

Setup Schedule

Set up: Daily; Report available: 2-3 days

Reference Range

See Laboratory Report

Clinical Significance

T-lymphocyte count assists in evaluating cellular immunocompetency.

Performing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153

Last Updated: November 17, 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.