T4, Free
Methodology
Chemiluminescent immunoassay
Alternate Names
FT4, Free T4, Thyroxine Free
SoftLab Order Code
FT4
Epic Order Name
T4, FREE
Epic Order ID
LAB127
Laboratory
Raleigh
Additional Test Information
Free T4 is susceptible to biotin interference at a concentration of 100 ng/mL
Sample Type
Serum
Collection Container
RST (Orange top - Rapid Serum Tube)
Alternative Collection Container
SST (Gold Top Serum Separator tube)
Red/Black Speckle top (Serum tube)
Collecting Volume
1.0 mL
Minimum Collecting Volume
1.0 mL
Storage or Stability
Refrigerate - sample is stable 8 hours at room temperature, otherwise, refrigerate
Causes for Rejection
QNS
Patient Preparation
Patients taking Biotin should not be tested.
CPT Codes
84439