T4, Free

Supply #193262 Red/Gray SST 8.5mL

Test Code: 866

CPT Code(s): 84439

Methodology: Immunoassay

Clinical Significance: For diagnosis of hypothyroidism and hyperthyroidism

Additional names: Free T-4, Free Thyroxine, FT4, Thyroxine Free

Collection Guide: 

Supply: 193262 Red/Gray SST 8.5mL

Preferred Specimen: Serum

Preferred Volume: 1mL

Transport Container: Serum Separator Tube (SST)

Transport Temperature: Room Temperature

Specimen Stability: Room Temperature: 7 Days

Reject due: unlabeled or improperly labeled specimens and specimens other than serum

For additional supply or collection device information, please contact DLO's Customer Service at (800) 891-2917, option 2.

The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed.