Quetiapine, Serum/Plasma [35299]

Message

For Specimen Integrity during Extreme Weather see the “Lockbox Usage in Extreme Weather” document at the top of this page.

Test Code

QUETPN

Alias/See Also

35299

CPT Codes
80299 (G0480)

Preferred Specimen

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

Patient Preparation
Collect as trough prior to next dose.

Minimum Volume

0.4 mL

Other Acceptable Specimens

Plasma collected in: EDTA (lavender-top) tube

Instructions

Collect serum and remove from cells.

Transport Temperature

Room temperature

Specimen Stability

Room temperature: 21 days
Refrigerated: 21 days
Frozen: 21 days

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

Gel barrier tubes • Serum separator tubes (SST®)

Methodology
Chromatography/Mass Spectrometry

FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by the U.S. Food and Drug Administration. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Setup Schedule

Set up: Tues, Thurs, Sat; Report available: Next day

Reference Range

100-1000 ng/mL

Clinical Significance

Therapeutic drug monitoring.

Performing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153

Last Updated: January 3, 2024

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.