T4 (Thyroxine), Total)

Methodology: 
Chemiluminescent immunometric assay
Performed: 
Monday - Friday
Reported: 
Within 3 days
Specimen Requirements: 

Collect blood by venipuncture into an SST/gold-top tube or alternatively a light-green/lithium heparin tube.

Separate the serum/plasma from the cells, using centrifugation, and avoid hemolysis. If possible, keep specimens cold (2 - 8°C).

Stability (collection to time of analysis/testing):
  • Refrigerated (2 - 8°C): 7 days
  • Frozen (-20°C): 2 months
Reference Values: 
4.5 - 12.5 μg/dL
CPT Code (s): 
84439
Notes: 

UFHPL Test #: 20450

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