TPMT Enzyme (Prometheus) *

SIM

25060 

CPT

82657, 82542

Synonyms

Thiopurine methyltransferase enzyme 

Specimen Type

Whole Blood 

Container

Lavender-top (EDTA) tube

Collection Instructions

Volume

Volume:  5 ml. 
Minimum volume: 5 ml. 

Additional Information

TPMT Enzyme testing provides a quantitative analysis of a patient’s thiopurine methyltransferase enzyme activity level. 
Sent to Prometheus Diagnostics 

Patient Preparation

Specimen Processing Instructions

Do not transfer blood to aliquot tube, leave in original tube.

Transport Requirements

Refrigerated

Specimen Stability

Refrigerated: 8 days    

Room Temperature: 24 hours 

Rejection Criteria

Plasma or serum specimen; frozen specimen

Reference Range

Reference Range accompanies report

Critical Value

Test Includes

TPMT Enzyme Activity 

Methodology

Quantitative HPLC (High pressure Liquid Chromatography)  

Testing Frequency

Reviewed By

Lisa McBride

Reviewed Date

2/20/2018 

Supplemental

*  Denotes Reference Lab Test ; Sent to  Prometheus Diagnostics