Test Directory
4223 T3 (Triiodothyronine), Free
Specimen Type
Specimen Stability
Reference Range
Serum-SST
7 days 2-8° C
2.3-4.2 pg/mL
Specimen Requirements
Preferred amount: 1.0 mL Serum
Minimum amount: 0.5 mL Serum
Minimum amount: 0.5 mL Serum
Method
Immunochemiluminometric
Schedule
Mon-Sat
Turn-Around Time
24hrs; Also offered STAT at an additional charge
Instructions/Notes
Centrifuge required?: Yes
Clinical Utility
To help evaluate thyroid gland function.
CPT Codes
84481
