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HelpTest Code FMERC Mercaptopurine (6-MP, Purinethol)
Reporting Name
Mercaptopurine (6-MP, Purinethol)Specimen Type
VariesSpecimen Required
Submit only 1 of the following specimens:
Plasma
Draw blood in a green-top (sodium heparin) tube(s), plasma gel tube is not acceptable. Spin down and send 2 mL sodium heparin plasma refrigerated in a plastic vial.
Serum
Draw blood in a plain, red-top tube(s), serum gel tube is not acceptable. Spin down and send 2 mL of serum refrigerated in a plastic vial.
Specimen Minimum Volume
0.3 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Varies | Refrigerated (preferred) | 7 days | |
| Frozen | 180 days | ||
| Ambient | 72 hours |
Reject Due To
| Hemolysis | NA |
| Lipemia | NA |
| Icterus | NA |
| Other | NA |
Reference Values
Units: ng/mL
Mercaptopurine may be administered as an antineoplastic or may be present as a metabolite of the immunosuppressant drug azathioprine. Therapeutic and toxic ranges have not been established. Usual therapeutic doses of either mercaptopurine or azathioprine produce 6-mercaptopurine serum concentrations of less than 1000 ng/mL.
Day(s) Performed
Monday through Sunday
CPT Code Information
80299
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| FMERC | Mercaptopurine (6-MP, Purinethol) | 11242-5 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| Z1190 | 6-Mercaptopurine | 11242-5 |
Report Available
5 to 9 daysMethod Name
High Performance Liquid Chromatography with Ultraviolet Detection (HPLC-UV)