Test directory: TPMT Genotype

Ordering Code 6629
Test Name TPMT Genotype
Alias Azathioprine Toxicity
Mercaptopurine Toxicity
TPMT Deficiency
Preferred Specimen Whole Blood
Preferred Container EDTA, K2 (Lavender)
Other Specimen/Container Whole Blood in ACD-B (Yellow), Whole Blood in Sodium Heparin (Green)
Optimum Volume 5 mL
Transport Requirements Oahu: Ambient
Airline: Ambient
Specimen Stability Ambient: 8 Days
Refrigerated: 8 Days
Frozen: Not Stable
Rejection Criteria Frozen
Avail. Stat NO
Analytic Time 14 Days
Methodology Polymerase Chain Reaction (PCR)
Reference Lab  Quest Diagnostic Lab-NI

Reference range(s)

The reference ranges listed below are valid on this date of October 5, 2026.
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.
Interpretation ALL See report.
Ethnicity ALL See report.
Clinical Indication ALL See report.
Referring Physician ALL See report.
Physician Phone ALL See report.