CPT: 80299
Print Share


  • Risperdal®

Expected Turnaround Time

3 days

Related Documents

Specimen Requirements


Serum or plasma


3 mL

Minimum Volume

0.6 mL


Red-top (no additive) tube or green-top (heparin) tube; gel-barrier tubes not recommended


Transfer separated serum or plasma to a plastic transport tube. Trough levels are most reproducible.

Storage Instructions

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

Test Details


Therapeutic drug management


This test was developed and its performance characteristics determined by Labcorp. It has not been cleared or approved by the Food and Drug Administration.


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

Reference Interval

Expected steady state concentrations of risperidone and 9-hydroxyrisperidone (combined total) in patients receiving recommended daily dosages: 10–120 ng/mL


Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
716563 Risperidone (Risperdal(R)), S 716564 Risperidone, Serum ng/mL 9393-0
716563 Risperidone (Risperdal(R)), S 716565 9-OH-Risperidone, Serum ng/mL 9383-1
716563 Risperidone (Risperdal(R)), S 716566 Total (Risp+9-OH) ng/mL 9394-8

For Providers

Please login to order a test

Order a Test

© 2023 Laboratory Corporation of America® Holdings and Lexi-Comp Inc. All Rights Reserved.

CPT Statement/Profile Statement

The LOINC® codes are copyright © 1994-2023, 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