Update Type: Test Resumed
Test Updated: 10/16/2024
Test Overview
Test Methodology

Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)

Test Usage

Therapeutic Drug Monitoring

Test Limitations

Methadone has a wide therapeutic index and dose-dependent toxicity. As a result, routine drug monitoring is not indicated in all patients.

Test Details
Days Set Up
Tuesday, Thursday, Sunday
Analytic Time

4 - 6 days

Soft Order Code
MDNS
MiChart Code
Methadone, Serum (Sendout)
Synonyms
    Laboratory
    Sendout
    Reference Laboratory
    Mayo MDNS
    Section
    Special Testing
    Specimen Requirements
    Collection

    SST not acceptable

    Collection Instructions

    Collect specimen in a red top tube (no SST). Centrifuge within 2 hours, aliquot serum into a plastic vial and refrigerate.

    Normal Volume
    0.5 mL serum
    Additional Information

    Test sent to Mayo Medical Laboratories.

    Billing
    CPT Code
    80358
    Fee Code
    22016
    NY State Approved
    No