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Test Code
QUETP
Test Name
Quetiapine, Quantitative, Whole Blood
CPT Codes
AMA 80342, CMS G0480
Expected Turnaround Time
5 - 7 days
Clinical Utility

Quetiapine is a neuroleptic agent used in the treatment of psychosis. Although routine therapeutic drug monitoring is not indicated, drug levels may be used to identify noncompliance and/or toxicity.

Useful in determining the use or abuse of Quetiapine.

Testing includes identification and quantitation of:

  • Quetiapine
Specimen and Container Info

Specimen

Container

Volume

Whole Blood

Grey Top* (Sodium Fluoride, Potassium Oxalate)

3 mL

Whole Blood

Dark Green Top (Lithium Heparin)

3 mL

Whole Blood

Lavender Top (EDTA)

3 mL

Serum

Red Top, Plain

1 mL

*Preferred Specimen
Processing and Submission Instructions

For forensic or legal purposes, submit specimen in a plastic evidence bag with a Chain-of-Custody Form.
Transport Instructions

Transport to the laboratory refrigerated.
Stability Requirements

Room Temperature

7 days

Refrigerated

 7 days
Causes for Rejection

Specimens collected in separator tubes will be rejected.
Methodology
Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
Reference Intervals

Expected steady state levels in patients receiving recommended daily dose:

  • 100-1000 ng/mL
Limitations

Analyte

Reporting Limit (ng/mL)

Quetiapine

25
Performing Location
Roble Road Core Laboratory
Alternate Names
  • Seroquel
Testing Schedule
Routine, 2 times per week
The American Medical Association (AMA) Current Procedural Terminology (CPT) codes published by HNL Lab Medicine are guidelines and are intended for informational purposes only. CPT coding is the exclusive responsibility of the billing entity. View the Terms.
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