Thioridazine and Metabolite, Serum/Plasma

Test Code

MELL

Quest Code

23232

Alias/See Also

THIORIDAZINE
MESORIDAZINE

CPT Codes
80299

Includes

Thioridazine and Mesoridazine

Preferred Specimen

2 mL serum collected in a red-top tube (no gel)

Minimum Volume

0.7 mL

Other Acceptable Specimens

Plasma collected in an EDTA (lavender-top), or EDTA (pink-top) tube

Instructions

Promptly centrifuge and separate serum or plasma into a plastic screw-capped vial using approved guidelines.

The use of serum separator tubes is not acceptable. Submission of a serum separator tube will result in cancellation.

Transport Temperature

Room temperature

Specimen Stability

Room temperature: 8 days
Refrigerated: 8 days
Frozen: 1 year

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Polymer gel separation tube • Serum separator tube (SST)

Methodology
Gas Chromatography (GC)

FDA Status
This test was developed and its performance characteristics determined by NMS Labs. It has not been cleared or approved by the US Food and Drug Administration.

Setup Schedule

Set up: As needed; Report Available: 4 days

Report Available

4 Days

Reference Range

See Laboratory Report

Clinical Significance

Thioridazine is a phenothiazine for treating psychosis. Monitoring its level is important to optimize therapy, to avoid toxicity, and to assure compliance.

See Drug Half-life, Steady State, and Recommended Sample Collection Time in the Toxicology section of Test Application and Interpretation.

Performing Laboratory
National Medical Services
200 Welsh Rd
Horsham, PA 19044

Last Updated: April 16, 2021

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.