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Thiopurine Methyltransferase Genotype
MessagePatient Preparation: A previous hematopoietic stem cell transplant from an allogenic Donor will interfere with testing. Call 800-533-1710 for instructions for testing patients who have received a hematopoietic stem cell transplant. Specimen Requirement: Lavender - EDTAImmediate Specimen Processing: 1. Invert several times to mix blood. 2. Send specimen in original tube. Do not aliquotAmbulatory Transport Temperature to Inova Central Lab: AmbientSpecimen Stability: 4 days
Test Code
LAB12519 TPNUV
Alias/See Also
TPNUV
CPT Codes
0034U
Includes
Patient Preparation: A previous hematopoietic stem cell transplant from an allogenic donor will interfere with testing. Call 800-533-1710 for instructions for testing patients who have received a hematopoietic stem cell transplant.@BKRCERMSGREFRESH(2302793)@ @BKRCERMSGREFRESH(2302794)@
Instructions
Processing Instructions: Send specimen in original tube. Do not aliquotPreferred Testing Volume: 3 mL Whole Blood3 mL Cord bloodMinimum Testing Volume: 3 mL Whole Blood3 mL Cord blood Transport Temperature: Ambient Stability: Ambient: 4 daysRefrigerated : 4 daysFrozen: 4 days Causes for Rejection: All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.Performing Lab: Mayo Clinic Laboratories
Report Available
5-Days
Clinical Significance
1230170198
Last Updated: May 18, 2026