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Labcorp Oklahoma, Inc.
Test Directory


Index:

Thyroid Analyzer

Order Name THYROID AN
Test Number: 4502350
Revision Date 10/01/2022
Test Name Methodology LOINC Code
Thyroid Stimulating Hormone (TSH)
Chemiluminescence Assay 3016-3 
SPECIMEN REQUIREMENTS
Specimen Specimen Volume (min) Specimen Type Specimen Container Transport Environment
Preferred 2.5 mL (1 mL) Serum Clot Activator SST Refrigerated
Alternate 1 2.5 mL (1 mL) Plasma Lithium Heparin PST (Light Green Top) Refrigerated
Instructions Stability: Ambient 1 day, Refrigerated 7 days, Frozen 6 months.
GENERAL INFORMATION
Testing Schedule Mon - Fri 
Expected TAT 1-3 days  
Clinical Use Useful clinically for evaluating thyroid patients. This analyzer follows an algorithm or cascade of tests based on the results of the TSH test. 
CPT Code(s)

Initial Testing

Test Name CPT Codes
TSH 84443
 

Possible Additional Testing

Test Name CPT Codes
Free T3 84481
Free T4 84439
Lab Section Chemistry