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Test Code P12 Prometheus TPMT Genetics

Important Note

TEST CODE P12 IS FOR OUT PATIENT ORDERS ONLY. See code YGTPMT for in patient orders. Send specimen directly to Prometheus Laboratories. Prometheus will bill patient insurance for MercyOne outpatient orders. Submit patient insurance information and appropriate diagnosis codes with the specimen on all outpatient orders only, so Prometheus will have all correct billing information.

Prometheus Laboratories, Inc.
Therapeutics and Diagnostics
9410 Carroll Park Drive
San Diego, CA 92121-4203

Additional Codes

ALAB: P12

MA Cerner: TPMT Genetics

Prometheus: 3300

Test Method

Quantitative High Pressure Liquid Chromatography (HPLC)

Specimen Requirement

5 mL whole blood is required.

Additional Specimen Collection Information

Collect whole blood in an EDTA purple-top tube(s) and send 5 ml of whole blood at refrigerated temperatures. Label the specimen appropriately with two identifiers, patient name and another identifier, (patient ID number, DOB, etc.) include date and time of collection and initials of person collecting the specimen. Ship with a cold pack (DO NOT FREEZE).

Performance

Testing is performed Monday through Friday.

Typically completed within 8 days after the specimen arrives at the testing site.

Reference Values

See Mayo entry for this test. (Check code YGTPMT for Mayo entry).

CPT Code Information

81401 Molecular pathology procedure, Level 2 (e.g. 2-10 SNPs, 1 methylated variant or 1 somatic variant [typically using non-sequencing target variant analysis], or detection of a dynamic mutation disorder/triplet repeat)

Useful For

Predicting potential for toxicity to thiopurine drugs (6-mercaptopurine, 6-thioguanine, and azathioprine).

LOINC Code Information

21563-2