Triiodothyronine, Free (LABCORP)

Test Code
99901000257


Alias/See Also
LAB137: T3, Free
LAB3204: T3, Free | LABCORP EAP: 010389


CPT Codes
84481x1

Preferred Specimen
LABCORP LAB: Serum Separator Tube (Refrigerated) Min Vol: .7


Other Acceptable Specimens
LABCORP LAB: YELLOW TOP: (Refrigerated) Min Vol: .7
LABCORP LAB: LIME TOP- LIHEP: (Refrigerated) Min Vol: .7
LABCORP LAB: MICRO YELLOW: (Refrigerated) Min Vol: .7
LABCORP LAB: RED TOP - PLAIN: (Refrigerated) Min Vol: .7


Instructions
Patient Preparation: Patient must not have received radioactive substance in the 24 hours prior to test.


Transport Temperature
Special Instructions Contact the LabCorp supply department for collection kit. Specimen Plasma with Trasylol®, frozen Volume 2 mL Minimum Volume 0.4 mL (Note: This volume does not allow for repeat testing.) Container Lavender-top (EDTA) tube Collection Trasylol® kits may be ordered through the PeopleSoft system (LabCorp N° 33328). Using a chilled 6-mL lavender-top (EDTA) tube taken from the kit, collect a whole blood specimen. Mix the specimen several times by inverting the EDTA collection tube. After removing the cap from the EDTA draw tube, take one of the sterile, Beral pipettes (from under the grey foam), and add 0.25 Trasylol® to the EDTA tube. Recap the EDTA tube and invert several times to mix well. Centrifuge the EDTA tube to separate the plasma from the cells, and immediately transfer the plasma into one of the brown screw-cap transfer tubes provided in the kit. There should be a ""Trasylol® Added"" label affixed to the brown transfer tubes. Cap and freeze the labeled transfer tube containing the EDTA plasma with Trasylol® added. To avoid delays in turnaround time when requesting multiple test on frozen samples, please submit separate frozen specimens for each test requested. Storage Instructions Freeze.


Report Available
LABCORP LAB
STAT: 5760 min
Routine: 5760 min
Extended TAT: No TAT min
Timed: 5760 min
Life or Death: 5760 min



Last Updated: March 6, 2023


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.