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Thyroid Stimulating Hormone, FT4 Reflex 

Message
If TSH is increased or decreased, Free Thyroxine (FT4) will be reflexed and tested.


Test Code
TSHMP


Alias/See Also
LAB0001287


CPT Codes
84443

Preferred Specimen
2.0 mL serum collected in a gold serum separator tube (SST)


Minimum Volume
1.0 mL serum


Other Acceptable Specimens
2.0 mL serum collected in an orange rapid clot serum separator tube (RCT)


Specimen Stability
Store centrifuged samples tightly stoppered at room temperature 15 - 30oC for no longer than eight hours.  If the assay will not be completed within eight hours, refrigerate the samples at 2 - 8oC.  If the assay will not be completed within 48 hours, or for shipment of samples, freeze serum at -20oC or colder.


Reference Range
See individual test for reference range.


Performing Laboratory
Penn Medicine Lancaster General Health

Additional Information
FT4 Reference Range
TSH Reference Range


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.