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

CPT Code(s): 84439
Specimen Required: Patient Preparation:
Collect:Plain red or serum separator tube (SST).
Specimen Preparation:Transfer 2 mL serum to an RDL Standard Transport Tube. (Min: 0.3 mL)
Storage/Transport Temperature:Refrigerated.
Stability:After separation from cells: Ambient: 4 days; Refrigerated: 2 weeks; Frozen: 1 month
New York DOH Approval Status: This test is New York DOH approved.
Aliases:
  • Direct DialysisFT4T4, Free, Equilibrium Dialysis
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