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Test Code FMEP Meperidine (Demerol) and Normeperidine, serum

Reporting Name

Meperidine (Demerol)

Performing Laboratory

Medtox Laboratories, Inc.

Specimen Type


Specimen Required

Submit only 1 of the following specimens:



Draw blood in a green-top (sodium heparin) tube(s). Plasma gel tube is not acceptable. Spin down and send 3 mL of sodium heparin plasma refrigerated in a plastic vial.



Draw blood in a plain red-top tube(s). Serum gel tube is not acceptable. Spin down and send 3 mL of serum refrigerated in a plastic vial.

Specimen Minimum Volume

0.6 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Varies Refrigerated (preferred) 14 days
  Frozen  180 days
  Ambient  72 hours

Reject Due To

Hemolysis NA
Lipemia NA
Icterus NA
Other NA

Reference Values


Reference Range: 400 - 700 ng/ml


Normeperidine: No reference range provided


Day(s) Performed

Monday through Sunday

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
FMEP Meperidine (Demerol) 68314-4


Result ID Test Result Name Result LOINC Value
Z1132 Meperidine 73934-2
Z1159 Normeperidine 73933-4

Report Available

5 to 9 days

Method Name

Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS)