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Labcorp Oklahoma, Inc.
Test Directory


Index:

Thyroid Profile (with T4, T7)

Order Name T7 PROF
Test Number: 2911175
Revision Date 06/04/2021
Test Name Methodology LOINC Code
Thyroid Hormone Binding Ratio (T3 Uptake)
Chemiluminescence Assay 3050-2 
Thyroxine (T4)
Chemiluminescence Assay 3026-2 
Thyroxine Index (T7), Free
Calculation 32215-6 
SPECIMEN REQUIREMENTS
Specimen Specimen Volume (min) Specimen Type Specimen Container Transport Environment
Preferred 1 mL (0.5 mL) Serum Clot Activator SST Refrigerated
Alternate 1 1 mL (0.5 mL) Plasma Lithium Heparin PST (Light Green Top) Refrigerated
Instructions Stability: Ambient 1 day. Refrigerated 6 days. Frozen 6 months
GENERAL INFORMATION
Testing Schedule Mon - Fri 
Expected TAT 1-2 Days  
CPT Code(s) 84479, 84436
Lab Section Chemistry