Test Details
Methodology
Liquid chromatography/tandem mass spectrometry (LC/MS-MS)
Result Turnaround Time
5 days
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Use
Therapeutic drug management
Limitations
This test was developed and its performance characteristics determined by Labcorp. It has not been cleared or approved by the Food and Drug Administration.
Specimen Requirements
Specimen
Serum or plasma
Volume
2 mL
Minimum Volume
0.5 mL
Container
Red-top (no additive) tube or green-top (heparin) tube; gel-barrier tubes not recommended
Collection Instructions
Transfer separated serum or plasma to a plastic transport tube. Collection time: Peak levels occur at 1-3 hours post dose; trough levels often not.
Stability Requirements
• Room temperature: Unstable
• Refrigerated: Unstable
• Frozen: 14 days
Reference Range
Therapeutic: 5.0−20.0 ng/mL
Storage Instructions
Submission/transport/storage: Freeze.
Causes for Rejection
Specimen received unfrozen
LOINC® Map
| Order Code | Order Code Name | Order Loinc | Result Code | Result Code Name | UofM | Result LOINC |
|---|---|---|---|---|---|---|
| 715300 | Methylphenidate, Serum | 3807-5 | 715301 | Methylphenidate, S | ng/mL | 3807-5 |
| Order Code | 715300 | |||||
| Order Code Name | Methylphenidate, Serum | |||||
| Order Loinc | 3807-5 | |||||
| Result Code | 715301 | |||||
| Result Code Name | Methylphenidate, S | |||||
| UofM | ng/mL | |||||
| Result LOINC | 3807-5 |