Test directory: TPMT and NUDT15 Genotyping

Ordering Code 7787
Test Name TPMT and NUDT15 Genotyping
Alias Thiopurine Methyltransferase (TPMT) and Nudix Hydrolase
(NUDT15) Genotyping, Varies
Preferred Specimen Whole Blood
Preferred Container EDTA, K2 (Lavender)
Optimum Volume 3 mL
Handling Instructions Send original tube, do not aliquot.
Transport Requirements Oahu: Ambient
Airline: Ambient
Specimen Stability Ambient: 9 Days
Refrigerated: 30 Days
Frozen: Not Stable
Rejection Criteria All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.
Avail. Stat NO
Analytic Time 7 Days
Methodology Real-Time Polymerase Chain Reaction (PCR) with Alletic
Discrimination Analysis
Reference Lab  Mayo Medical Lab

Reference range(s)

The reference ranges listed below are valid on this date of November 22, 2025.
Component Age Male Norm Male Critical Low Male Critical High Female Norm Female Critical High Female Critical Low Units Add'l info
TPMT Genotype ALL See report.
TPMT Phenotype ALL See report.
NUDT15 Genotype ALL See report.
NUDT15 Phenotype ALL See report.
Interpretation ALL See report.
Additional Information ALL See report.
Method ALL See report.
Disclaimer ALL See report.
Reviewed by ALL See report.