Tumor Necrosis Factor, alpha 
Mnemonic MISC
CPT 83520
Test Code 3509949
Synonyms TNF
Test Includes  
Specimen Serum
Volume 1 mL
Container Red-top tube or SST
Special Instructions Centrifuge and transfer serum into a purple screw cap container and freeze immediately. Maintain frozen until tested.
Specimen Prep  
Storage Frozen
Transport Temp Frozen
Stability Rm Temp unacceptable
Stability Refrig unacceptable
Stability Frozen 9 days
Methodology Enzyme-linked immunosorbent assay (ELISA)
Rejection Criteria Non-frozen specimen Non-serum specimen 
Reference Value 0.0-2.2 pg/mL