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Thyroid Function Cascade

Message
A TSH is run and if the result is low, it will reflex a Free T4.  If this Free T4 is low or normal it will reflex a Free T3.
If the TSH result is high, it will reflex Free T4 and TPO Antibody tests.
If the TSH is normal, no further testing is indicated.


Test Code
TFC


Alias/See Also
Thyroid Reflex


CPT Codes
84443, may add additional

Includes
TSH (Thyroid Stimulating Hormone).  May reflex additional tests Free T4, Free T3, or TPOAB based on patient results.


Preferred Specimen
light green lithium heparin tube


Patient Preparation
None

Minimum Volume
4.0 mL


Instructions
Collect light green lithium heparin tube, centrifuge and refrigerate.


Transport Container
light green lithium heparin tube


Transport Temperature
Refrigerated


Setup Schedule
Every day


Report Available
Within 24 hours


Reference Range
TSH normal range 0.2700-4.2000.


Performing Laboratory
MMH laboratory, Belpre laboratory, SGH laboratory



The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.