Triiodothyronine (T3) (LABCORP)

Test Code
99901000079


Alias/See Also
LAB7610: Total T3 | LABCORP EAP: 002188


CPT Codes
84480x1

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
Adults: 3 mL yellow gel tube *Pediatric minimum: 2 red microtainers*


Transport Temperature
Special Instructions: If patient is pregnant, include approximate gestational age on the test request form and order test 010801. Values obtained with different assay methodologies should not be used interchangeably in serial testing. It is recommended that only one assay method be used consistently to monitor a patient’s course of therapy. This procedure does not provide serial monitoring; it is intended for one-time use only. If serial monitoring is required, please use the serial monitoring number (480012) to order. Specimen: Serum Volume: 1 mL Minimum Volume: 0.7 (NOTE: This volume does NOT allow for repeat testing) Container: Gel-barrier tube (preferred) or red-top tube Collection: If a red-top tube is used, transfer separated serum to a plastic transport tube. Stability: Room temperature 14 days Refrigerated 14 days Frozen 14 days Freeze/thaw cycles Stable x3


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.