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Labcorp Oklahoma, Inc.
Test Directory


Index:

T3 (Triiodothyronine), Total

Order Name T3
Revision Date 05/21/2020
Test Name Methodology LOINC Code
T3 (Triiodothyronine), Total
 
SPECIMEN REQUIREMENTS
Specimen Specimen Volume (min) Specimen Type Specimen Container Transport Environment
Preferred 1.0 mL (0.5 mL) Serum Serum Gel Tube Refrigerated
Alternate 1 1.0 mL (0.5 mL) Serum Red Top Refrigerated
Instructions Patient Preparation: For 12 hours before this test do not take multivitamins or dietary supplements containing biotin (vitamin B7), which is commonly found in hair, skin, and nail supplements and multivitamins.

Label specimen with Mobilab label or with patient name (first and last), date of birth, date and time of collection, collector initials, and test(s) being ordered.
Reference Range An interpretive report will be provided.
Methodology Electrochemiluminescence Immunoassay
GENERAL INFORMATION
Testing Schedule Monday through Friday; 5 a.m.-12 a.m.; Saturday; 6 a.m.-6 p.m. 
Expected TAT 1-3 Days  
Notes Specimen Stability:
Refrigerated (preferred)- 7 Days
Frozen - 30 Days
Test Aliases T3 Suppression
T3 Total, Serum
Total T3, Serum
Triiodothyronine (T3)
Triiodothyronine, Total T3
T3 (Triiodothyronine), Total Only, Serum (Order T3 unless specified)
Thyroid Function Cascade
Triiodothyronine (Order T3 if not specified)
CPT Code(s) 84480
Lab Section NRLS-Mayo Medical Laboratories