A589

Test CODE NAME

A589

Thyroxine, Free (T4 Free) by Equilibrium Dialysis/HPLC-Tandem Mass Spectrometry

Methodology: Quantitative Equilibrium Dialysis/High Performance Liquid Chromatography-Tandem Mass Spectrometry
Performed: Sun, Tue, Thu
Reported: 3-7 days
Specimen Required: Collect: Plain Red - 2 ml serum.
Specimen Preparation: Transfer  serum to an  Standard Transport Tube. 
Storage/Transport Temperature: Refrigerated. 
Stability: After separation from cells:  Refrigerated: 1 week; Frozen: 1 month 
Note: This test is approved for NY . 
Performing Lab 
ARUP Laboratory1
CPT Code(s): 84439