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Test Listing: FREE THYROXINE



Code 4009
Test or Panel Test
Name FREE THYROXINE
Specimen Type N/A
Preferred Volume 1 mL
Minimum Volume (Emergencies only) 0.5 mL
Patient Prep N/A
Collection Procedure N/A
Specimen Processing Separate serum from cells and transfer to a standard aliquot tube.
Storage and Transport N/A
Stability N/A
Unacceptable Condition EDTA plasma, avoid repeat/freeze thaw cycles
Alternate Specimens Heparinized plasma or PST tube
Limitations N/A
CPT Codes 84439 x 1
Interface Order Code N/A
Testing Schedule Mon-Fri
Available STAT? No
Turnaround Time 24 Hours
Methodology Chemiluminescence
Alias T4DDUW
Synonyms Free Thyroxine (T4)

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