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Test Code MPHNU Methylphenidate and Metabolite, Random, Urine


Additional Testing Requirements


If urine creatinine is required or adulteration of the sample is suspected, also order ADULT / Adulterants Survey, Random, Urine. For more information, see ADULT / Adulterants Survey, Random, Urine.



Specimen Required


Supplies: Sarstedt Aliquot Tube 5 mL (T914)

Collection Container/Tube: Plastic urine container

Submission Container/Tube: Plastic, 5-mL tube

Specimen Volume: 5 mL

Collection Instructions:

1. Collect a random urine specimen.

2. No preservative.

Additional Information:

1. No specimen substitutions.

2. STAT requests are not accepted for this test.

3. Submitting less than 1 mL will compromise the ability to perform all necessary testing.


Specimen Type

Urine

Specimen Minimum Volume

0.5 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Urine Refrigerated (preferred) 10 days
  Frozen  28 days

Reject Due To

Gross hemolysis OK
Gross icterus OK

Reference Values

Negative

 

Cutoff concentrations by liquid chromatography tandem mass spectrometry:

Methylphenidate: 10 ng/mL

Ritalinic Acid: 50 ng/mL

Day(s) Performed

Monday, Wednesday, Friday

Report Available

2 to 4 days

Specimen Retention Time

14 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information

80360

G0480 (if appropriate)