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TPMT Genotype
Test CodeTPMT
Alias/See Also
TPMT Genotype
Quest Code
377428
Quest Code
377428
CPT Codes
81401
Preferred Specimen
5 mL whole blood collected in an EDTA (lavender-top) tube
Minimum Volume
3 mL
Other Acceptable Specimens
5 mL whole blood collected in a sodium heparin (green-top) tube
5 mL whole blood collected in an ACD-A or ACD-B (yellow-top) tube
5 mL whole blood collected in an ACD-A or ACD-B (yellow-top) tube
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 8 days
Refrigerated: 8 days
Frozen: unacceptable
Refrigerated: 8 days
Frozen: unacceptable
Methodology
Polymerase Chain Reaction (PCR), Single Nucleotide Primer Extension
This test was developed and its performance characteristics have been determined by Quest Diagnostics. Performance characteristics refer to the analytical performance of the test
Setup Schedule
Tuesday, Friday a.m.
Report Available
8 days
Limitations
This test detects 95% of the mutations in the TPMT gene and thus not all intermediate or slow metabolizers will be identified.
Clinical Significance
This test detects common deficiency variants in the TPMT gene and therefore identifies individuals who are at risk of developing serious adverse effects when administered thiopurine drugs.
Performing Laboratory
Quest Diagnostics Nichols Institute
San Juan Capistrano, CA
Performing Laboratory
Quest Diagnostics Nichols Institute
San Juan Capistrano, CA