CD19 Count
Test Mnemonic
ABS19
CPT Codes
- 85048 - QTY (1)
- 86355 - QTY (1)
LOINC ®
8116-6, 8117-4, 26464-8
Aliases
- CD19
Includes
- CD19%
- CD19 absolute number
Performing Laboratory
Cleveland Clinic Laboratories
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 4 mL | Whole blood | EDTA (Lavender) | Ambient | Ambient | Draw one 2 ml EDTA tube. |
Stability
| Environmental Condition | Description |
|---|---|
| Ambient | Maintain at room temperature when transporting to laboratory. Specimen stability is < 72 hours old. Samples >72 hours old will be rejected. |
Days Performed
Mon - Sat
Turnaround Time
1 - 2 days
Special Info
4ml Lavender (EDTA). Minimum Volume (2ml). store at room temperature. No sharing.
Clinical Info
This test is used for monitoring B-cell targeted therapy.
Clinical Limitation
This test is used for CD19 positive B-cells. It is not meant for enumeration of T-cells or NK cells.
Clinical Reference
CD19+ B cell % 5-22 CD19+ B cell # 75-660 No pediatric ranges for CD19.