Olanzapine

Zyprexa^®

Test Codes

Order Reference Lab Send Outs as Miscellaneous. EPIC: LAB848, Beaker: Ref Misc., Quest: 70073

Department

Send Outs

Specimen Collection Criteria

Collect (preferred specimen): One plain Red-top tube.

Do not use Serum Separator Tubes.

Physician Office/Draw Specimen Preparation

Let specimen clot 30-60 minutes then centrifuge to separate serum from cells. Transfer serum to plastic transport tube and maintain at room temperature (20-26°C or 68-78.8°F) prior to transport.

Preparation for Courier Transport

Transport: 3.0 mL serum, at room temperature (20-26°C or 68-78.8°F). (Minimum: 2.0 mL)

Rejection Criteria

• Serum separator tube (SST)
• Specimens not collected and processed as indicated. 

In-Lab Processing

Let specimen clot 30-60 minutes then centrifuge to separate serum from cells. Transfer serum to plastic transport tube and maintain at room temperature (20-26°C or 68-78.8°F).

Transport: 3.0 mL serum, at room temperature (20-26°C or 68-78.8°F). (Minimum: 2.0 mL)

Storage

Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): 30 days
Refrigerated (2-8°C or 36-46°F): 30 days
Frozen (-20°C/-4°F or below): 1 month

Specimen Storage in Department Prior to Disposal:

Specimen retention time is determined by the policy of the reference laboratory. Contact the Send Outs Laboratory with any questions.

Laboratory

Sent to Quest Diagnostics, Wood Dale, IL.

Performed

Tuesday – Saturday.
Results available in 1-4 days.

Reference Range

5.0-75.0 ng/mL

Test Methodology

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

Interpretation

By report.

Clinical Utility

This assay aids in the therapeutic drug monitoring of Olanzapine (Zyprexa^®) an antipsychotic agent. Zyprexa^® is indicated for the management of the manifestations of psychotic disorders.

CPT Codes

80299

Contacts

Last Updated

12/22/2025