THYROID TESTING CASCADE

Message
CHEMISTRY


Test Code
TSH CASCADE


Alias/See Also
TSH CASCADE


Preferred Specimen
SERUM


Minimum Volume
3mLs


Instructions
DRAW 1 GOLD TOP SST TUBE, LET CLOT FOR 30 MINUTES AND SPIN DOWN. The cascade starts with a TSH. If the TSH result is abnormal, a free T4 is performed automatically ("reflex testing"). In cases where a TSH
is suppressed and the free T4 is low or normal, a total T3 is done to test for T3 toxicosis. This test cascade is only intended for ambulatory patients and is not recommended for inpatients, patients with pituitary or hypothalamic disorders or patients with acute illness or neuropsychiatric disease.


Transport Container
ORIGINAL TUBE


Transport Temperature
REFRIGERATED


Setup Schedule
DAILY


Report Available
DAILY


Reference Range
PLASMA: REF. HIGH: 475, REF. LOW: 204 ug/Dl


Performing Laboratory
WHITE RIVER JUNCTION VT VA- CHEMISTRY 802-295-9363 EXT: 5518, 5519



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.