Ketamine and Metabolite, Quantitative, Serum or Plasma

CPT: 80357
Print Share

Test Details


  • Ketalar®

Test Includes

Ketamine; norketamine


Therapeutic drug management; detect presence of ketamine


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

Specimen Requirements


Serum or plasma


2 mL


Red-top tube or gray-top (sodium fluoride) tube. Gel-barrier tubes are not recommended.

Patient Preparation

Trough levels are most reproducible.


Serum or plasma should be separated from cells within two hours of venipuncture. Submit serum or plasma in a plastic transport tube.

Storage Instructions

Submission/transport (<3 days): Room temperature. For storage beyond three days, specimen should be refrigerated or frozen.

Causes for Rejection

Gel-barrier tubes


Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
790620 Ketamine and Mtb. Qt, S/P 790572 Ketamine ng/mL 3701-0
790620 Ketamine and Mtb. Qt, S/P 790575 Ketamine and Mtb, Qt, S/P N/A
790620 Ketamine and Mtb. Qt, S/P 790576 Norketamine ng/mL 21421-3

For Providers

Please login to order a test.


© 2018  Laboratory Corporation of America® Holdings and Lexi-Comp Inc. All Rights Reserved.

CPT Statement/Profile Statement

The LOINC® codes are copyright © 1994-2018, 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 Additional information regarding LOINC® codes can be found at, including the LOINC Manual, which can be downloaded at