THYROXINE FREE
Mnemonic: T4
CPT Code: 84439
Specimen Type
Serum
Specimen Container
Mint green top (lithium heparin)(LGR)
Specimen Handling
If red-top tube is used, transfer separated serum to a plastic transport tube.
Unacceptable Conditions
Citrate plasma specimen; improper labeling
Temperature
Room temperature
Volume
0.8 mL
Minimum Volume
0.3 mL (NOTE:This volume does NOT allow for repeat testing.)
Stability
Room Temperature: 14 days; Refrigerated: 14 days; Frozen: 14 days
Turn Around Time
STAT order Turnaround Time is 60 minutes or less / Routine test Turnaround Time is 4 hours or less
Place of Service
MLAB
Department
MCHM
| Result Code | Result Name | LOINC | Units of Measure |
|---|---|---|---|
| T4 | THYROXINE FREE | 3024-7 | ng/dL |
Select Print Details
Select an option which you would like to print: