Cd154functiontcellsql
Key facts at a glance
- LOINC
- 98241-3
- Short code
- CD154F
- Synonyms
- CD154 Function T cells Ql
- Category
- chemistry
- Sample
- serum
- Container
- Heparinized (sodium heparin) green-top tube or specialized T cell function transport tube; peripheral blood sample preferred
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 0–99 years
- Method
- Flow cytometry-based functional assay measuring CD154 (CD40L) expression on activated T cells following in vitro stimulation, evaluating binding capacity to CD40
- CPT
- 86352
- SNOMED
- 4405009
- Specimen volume
- 5-10 mL whole blood (pediatric: 2-5 mL depending on age); minimum 3 mL for functional assays
- Stability
- Specimen must be processed within 24-48 hours of collection when stored at room temperature (18-25°C); do not refrigerate as this may affect T cell viability and function
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 48–168 hours
- Order
- routine
Reference range
Result reported as Present or Absent. Normal healthy individuals typically demonstrate presence of functional CD154 expression on activated CD4+ T cells upon appropriate stimulation. Reference ranges are laboratory-specific and should be interpreted in clinical context.N/A
No special preparation required. Avoid recent immunosuppressive therapy if possible, as it may affect T cell function. Inform laboratory of any current medications.
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