Methylphenidate, Serum or Plasma

TEST: 715300
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CPT: 80360
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Synonyms

  • Ritalin®

Expected 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.

Related Documents

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

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.

Storage Instructions

Submission/transport/storage: Freeze.

Stability Requirements

• Room temperature: Unstable

• Refrigerated: Unstable

• Frozen: 14 days

Causes for Rejection

Specimen received unfrozen

Test Details

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.

Methodology

Liquid chromatography/tandem mass spectrometry (LC/MS-MS)

Reference Interval

Therapeutic: 5.0−20.0 ng/mL

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

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The LOINC® codes are copyright © 1994-2021, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. Permission is granted in perpetuity, without payment of license fees or royalties, to use, copy, or distribute the LOINC® codes for any commercial or non-commercial purpose, subject to the terms under the license agreement found at https://loinc.org/license/. Additional information regarding LOINC® codes can be found at LOINC.org, including the LOINC Manual, which can be downloaded at LOINC.org/downloads/files/LOINCManual.pdf