Free T4

Test Code
LAB127 1230100031


Alias/See Also
FREE T4
FT4


CPT Codes
84439

Includes
THYROXINE (T4) FREE (NG/DL) IN SER/PLAS


Preferred Specimen
Serum


Transport Container
SST


Transport Temperature
Refrigerated


Specimen Stability
Do not use turbid specimens


Reference Range
Result Checking Type Low (N) High (N) Numeric Range (N)
Reference Range 0.58 1.90 0.58-1.90


Performing Laboratory
MWH LAB SH LAB



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.