T4, Free with Reflex to TSH

Test Code
FT4R


Preferred Specimen
2 mL Lithium Heparin plasma or serum (1.0 minimum)


Transport Container
PST Tube, SST Tube also accepted


Transport Temperature
Ambient


Specimen Stability
Stable for 7 days at 2-8 °C, 1 month at -20 °C.8 Freeze only once




The CPT Codes provided in this document 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. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.