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Test Code T4 T4 (Thyroxine), Total

Specimen Required


Lithium Heparin Plasma Separator Tube (Green) or

Serum Separator Tube (Yellow)

CPT Code

84436

Specimen Handling and Storage

Handle and store specimens in stoppered containers to avoid contamination and evaporation.

 

Centrifuge specimen to remove the plasma/serum from the cellular material after collection.

 

Specimen Stability 

Refrigerated : 5 Days
Frozen : 4 Weeks