Test Details

Mnemonic

CLOZA

Ordering Code

1757000

CPT-4 Code(s)

80159

Specimen Information

Collect

Red top

Specimen Preparation

Centrifuge, separate serum from cells and send 1.0 mL serum refrigerated in a screw capped plastic vial.

Alternate Specimen

Plasma: Lavender EDTA, gray sodium fluoride, potassium oxalate

Minimum Volume

0.5 mL

Transport Temperature

Refrigerated

Rejection Criteria

Serum separator tube (SST), Heparinized samples

Stability

Room temperature: 48 hours
Refrigerated: 14 days
Frozen: 14 days

Methodology

High Performance Liquid Chromatography/Tandem Mass Spectrometry
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Reference Range

Clozapine: 200 - 700 ng/mL
Clozapine toxic level: >1000 ng/mL
Norclozapine: 200 - 700 ng/mL
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Performing Laboratory

Warde Medical Laboratory
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New York DOH Approval Status

No
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