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T3 Free

Last modified by  ivette_marrero  on  April 03, 2014 10:00 AM

UNC Hospitals
McLendon Clinical Laboratories
101 Manning Drive
Chapel Hill, NC 27514
Free T3
Tube Type
gold top serum separator tube red top pediatric serum separator bullet
Test ID   FRT3
EPIC Order
  T3, FREE
CPT Code(s)   84481
Group/Individual Test   Individual 
Laboratory   Core Laboratory
Tube Station   30
Specimen Routine: 4 mL blood/serum separator tube/gold top/red top acceptable
  Micro: 500 ┬ÁL blood/gold or red top bullet
Availability Routine: 24 hrs/7 days
  STAT: Yes
Turnaround Time   2 hrs
Reference Range and


Euthyroid patients
Age Group (years)
Free T3 Reference range (pg/mL)
(effective 8/5/2011)
<20 2.28-4.81
20-39 2.32-6.09
40-59 2.71-6.16
60-79 2.45-5.93
>79 2.34-5.61
Reference Range and

(effective 8/5/2011)

Euthyroid pregnant women  
Free T3 Reference range (pg/mL)
(effective 8/5/2011)
First 2.88-4.32
Second 2.56-4.41
Third 2.47-4.73
Comments  See Core Laboratory numbered Memo #99


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