Test Directory
4276 TSH with reflex to Free T3 and Free T4
Specimen Type
Specimen Stability
Reference Range
Serum-SST
7 days 2-8° C
0.35-4.50 uIU/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
Free T3 and Free T4 will be performed at an additional charge (CPT code(s): 84481 and 84439) when TSH result exceeds age/gender specific reference range.
Free T3 and Free T4 will be performed at an additional charge (CPT code(s): 84481 and 84439) when TSH result exceeds age/gender specific reference range.
Clinical Utility
To screen for and help diagnose thyroid disorders; to monitor treatment of hypothyroidism and hyperthyroidism.
CPT Codes
84443 (See 'Instructions/Notes')
