A B C D E F G H I J K L M N O P Q R S T U V W X Y Z #

Free T4 by Dialysis/Mass Spec

Test Code
501902


CPT Codes
84439

Preferred Specimen
Serum OR plasma (EDTA),


Minimum Volume
0.5 mL; Pediatric Volume: 0.4 mL (NOTE:This volume does NOT allow for repeat testing).


Instructions
Serum or plasma must be separated from cells within 45 minutes of venipuncture. Send serum or plasma in plastic transport tube. To avoid delays in turnaround time when requesting multiple test on frozen samples, PLEASE SUBMIT SEPARATE FROZEN SPECIMENS FOR EACH TEST REQUESTED.


Transport Container
plastic transport tube


Transport Temperature
FREEZE


Specimen Stability
Room temp: 2 days; Refrigerated: 5 days; Frozen: 453 days


Methodology
Direct dialysis mass spectrometry; high pressure liquid chromatography/mass spectrometry (HPLC/MS)



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.