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HelpTest Code TBNK Quantitative Lymphocyte Subsets: T, B, and NK, Blood
Shipping Instructions
Specimen must arrive within 48 hours of collection. Collect and package specimen as close to shipping time as possible.
Necessary Information
Date of collection is required.
Specimen Required
For serial monitoring, it is recommended that specimen collection be performed at the same time of day.
Container/Tube: Lavender top (EDTA)
Specimen Volume: 3 mL
Collection Instructions: Send whole blood specimen in original tube. Do not aliquot.
Secondary ID
800295Useful For
Serial monitoring of CD4 T-cell count in HIV-positive patients
Follow-up and diagnostic evaluation of primary immunodeficiencies, including severe combined immunodeficiency
Immune monitoring following immunosuppressive therapy for transplantation, autoimmunity, and other immunological conditions where such treatment is utilized
Assessment of immune reconstitution post hematopoietic cell transplantation
Early screening of gross quantitative anomalies in lymphocyte subsets in infection or malignancies
Absolute quantitation of circulating B cells for diagnosis of chronic lymphocytic leukemia patients as indicated in the 2008 International Workshop on Chronic Lymphocytic Leukemia guidelines
Method Name
Flow Cytometry
Reporting Name
QN Lymphocyte Subsets: T, B, and NKSpecimen Type
Whole Blood EDTASpecimen Minimum Volume
1 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Whole Blood EDTA | Ambient | 72 hours | PURPLE OR PINK TOP/EDTA |
Reject Due To
| Gross hemolysis | Reject |
| Gross lipemia | Reject |
Reference Values
The appropriate age-related reference values will be provided on the report.
Day(s) Performed
Monday through Friday, Sunday
Report Available
Same day/1 to 3 daysPerforming Laboratory
Mayo Clinic Laboratories in Florida
Test Classification
This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.CPT Code Information
86355-B cells, total count
86357-Natural killer (NK) cells, total count
86359-T cells, total count
86360-Absolute CD4/CD8 count with ratio
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| TBNK | QN Lymphocyte Subsets: T, B, and NK | 80721-4 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| LYMPJ | CD45 Total Lymph Count | 27071-0 |
| PCD3J | % CD3 (T Cells) | 8124-0 |
| PD19J | % CD19 (B Cells) | 8117-4 |
| PD16J | % CD16+CD56 (NK cells) | 8112-5 |
| PCD4J | % CD4 (T Cells) | 8123-2 |
| PCD8J | % CD8 (T Cells) | 8101-8 |
| CD3J | CD3 (T Cells) | 8122-4 |
| CD19J | CD19 (B Cells) | 8116-6 |
| CD16J | CD16+CD56 (NK cells) | 20402-4 |
| CD4J | CD4 (T Cells) | 24467-3 |
| CD8J | CD8 (T Cells) | 14135-8 |
| H_SJ | 4/8 Ratio | 54218-3 |
| CMTTB | Comment | 80722-2 |