T4 Free, Serum

CERNER / EPIC MNEMONIC: FREE T4
POE DESCRIPTION: FREE THYROXINE; THYROXINE (FREE), T4; FREE T4
CPT CODE: 84439
DAYS PERFORMED: Daily
TURNAROUND TIME:

8 hours

CONTAINER TYPE:

SST tube or Red top tube

SPECIMEN REQUIREMENTS: Blood (serum)
MINIMUM VOLUME: 1 mL blood (0.5 mL serum)
REFERENCE RANGE: 0.7-1.5 ng/dL
TEST SYNONYM(S):Free Thyroxine; Unbound T4