Cd19cellsnfrcsf
Key facts at a glance
- LOINC
- 51265-7
- Short code
- CD19CSF
- Synonyms
- CD19 Cells NFr CSF
- Category
- chemistry
- Sample
- csf
- Container
- Sterile CSF collection tube (polypropylene); tube #3 or #4 typically preferred for cell-based assays to minimize blood contamination.
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- Flow Cytometry (Immunophenotyping)
- CPT
- 86356
- SNOMED
- 116859006
- Specimen volume
- 1-2 mL of cerebrospinal fluid; minimum 0.5 mL recommended for flow cytometry analysis.
- Stability
- Specimen should be processed within 1-2 hours of collection for optimal cell viability. If delay is anticipated, refrigerate at 2-8°C; do not freeze. Specimen should ideally be analyzed within 4 hours.
- Hemolysis max
- 200
- TAT
- 4–24 hours
- Order
- routine
Reference range
CD19+ B-lymphocytes are typically absent or present in very low numbers in normal cerebrospinal fluid. Reference ranges vary by laboratory; results should be interpreted in the context of clinical findings.N/A
No special patient preparation is typically required. Informed consent may be necessary for lumbar puncture procedure. Patient should remain still during the procedure.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy