252

Test CODE NAME

252

Thyroxine, Free (Free T4)

Methodology: Quantitative Electrochemiluminescent Immunoassay
Performed: Sun-Sat
Reported: 1-2 days
Specimen Required: Collect: Serum Separator Tube (SST). 
Specimen Preparation: Serum free from hemolysis is the recommended specimens. Allow blood samples to clot (15 mins). Separate the serum from the cells by centrifuging for 10 minutes. Store serum at 2-8°C until analysis.
Storage/Transport Temperature: Refrigerated. 
Stability:  If the assay will not be completed within eight hours, refrigerate the samples at 2 to 8°C. If the assay will not be completed within 48 hours, or for shipment of samples, freeze at -20°C or colder.

NOTE: * This test is approved for all states. *

Performing Lab 
Accu Reference Medical Laboratory
CPT Code(s): 84439