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Labcorp Oklahoma, Inc.
Test Directory


Index:

Thiopurine Metabolites (6-TG, 6-MMP)

Order Name Thiopurine Met
Test Number: 6900571
Revision Date 12/12/2022
Test Name Methodology LOINC Code
6-Thioguanine
Quantitative Liquid Chromatography/Tandem Mass Spectrometry 32660-3 
6-Methylmercaptopurine
Quantitative Liquid Chromatography/Tandem Mass Spectrometry 32654-6 
SPECIMEN REQUIREMENTS
Specimen Specimen Volume (min) Specimen Type Specimen Container Transport Environment
Preferred 3 mL (1 mL .) Whole Blood EDTA (Lavender Top) Refrigerated
Instructions Notes: 1 mL (Note: This volume Does NOT allow for repeat testing).
Specimen Type: Lavender-top (EDTA) tube
Specimen Storage: Refrigerate Stability: Room temperature up to 1 day Refrigerated up to 8 days Frozen unstable
Specimen Collection: Collect blood in lavender-top (EDTA) tube only. Gently invert to mix. Submit whole blood refrigerated. Do not separate specimen. Do not freeze.
Special Instructions: **Testing is performed at Esoterix Endocrinology Laboratory ES#803800 **This test includes Serial Monitoring**
Specimen Stability: Ambient: Not Available, Refrigerated : Not Available, Frozen: Not Available
GENERAL INFORMATION
Expected TAT 6 - 12 days  
Performing Labcorp Test Code 503800 
Notes Whole blood washing and red blood cell harvesting/counting. Liquid chromatography/tandem mass spectrometry (LC/MS-MS) after acidic hydrolysis
?Labcorp Test Code: 503800
CPT Code(s) 80299 x2 (G0480)
Lab Section Reference Lab