T4 (Thyroxine), TotalMain Content
Test Code: 867
CPT Code(s): 84436
Methodology: Immunoassay (IA)
Clinical Significance: For diagnosis of hypothyroidism and hyperthyroidism
Note: Free T4 Index (T7) will only be calculated and reported if order code 861 (T3 Uptake) is ordered as well.
Additional names: T4; T-4 (RIA); T4 Total; Tetraiodothyronine; Thyroxine; Thyroxine T4; Thyroxine Total
Supply: T01 - 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: Specimens exceeding stability; Unlabeled or improperly labeled specimens
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.