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TPMT Enzyme

Message


Please clarify with physician if the order says "thiopurine methyltransferase level".

Testing performed by Prometheus Laboratories, San Diego, CA.




Test Code
TPMTE


Alias/See Also
Thiopurine methyltransferase (TPMT) enzyme activity level.

TPMT Enzyme activity level


CPT Codes
82657, 82491

Includes
TPMT enzyme activity and 6-methyl-thoguamine HPLC


Preferred Specimen
5.0 mL of whole blood


Transport Container
EDTA (Lavender top)


Transport Temperature

Room Temperature

Ship to Prometheus refrigerated.




Specimen Stability
Room Temperature: 24 hours
Refrigerated: 8 days


Methodology
High Performance Liquid Chromatography

Report Available
3 business days from receipt at Prometheus Laboratories.


Performing Laboratory
Prometheus Laboratories



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.