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T4 Free, Direct Dialysis

Message
Collect a full tube, following standard venipuncture techniques.


Test Code
LAB13031 T4FDD


Alias/See Also
T4FDD


CPT Codes
84439

Includes
@BKRCERMSGREFRESH(2302793)@ @BKRCERMSGREFRESH(2302794)@


Instructions
Minimum Testing Volume: 0.5 mL Serum Transport Temperature: Ambient Stability: Ambient: 4 DaysRefrigerated : 14 DaysFrozen: 35 Days Causes for Rejection: LipemiaHeparin plasmaEDTA plasma


Report Available
6-Days


Clinical Significance
1230170804



Last Updated: May 18, 2026


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.