Test Code FT4 Free T4 (Thyroxine)

Specimen Required

Lithium Heparin Plasma Seperator Tube (Green) or

Red Top or Serum Seperator Tube SST (Yellow)

Specimen Handling and Stability

Handle and store specimen in stopper containers to avoid contamination and evaporation.

Centrifuge specimen to remove serum from cellular elements after collection.

Specimen Stability

* Refrigerated - 7 Days

* Frozen - 4 Weeks

CPT Code

84439

Related Tests

TSH with Free T4 reflex if indicated