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THYROID CASCADE

Message
Thyroid stimulating hormone (TSH) will be performed first. If the TSH result is abnormal, a free T4 will be performed.


Test Code
THYC


Preferred Specimen
Serum


Instructions
Centrifuge PST or SST (after clotting) to separate serum from cells.


Transport Container
SST or PST for Chemistry


Methodology
Siemens Centaur

Clinical Significance
Thyrotropin (Thyroid Stimulating Hormone or TSH) is the primary test for screening for both hyper- and hypothyroidism. If the result of the TSH is abnormal, a Free Thyroxine (FT4) test will be performed, which will help in determining if the patient is truly hyper- or hypothyroid. At that point, additional testing may be needed to determine the cause.




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.