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Test ID FQUET Quetiapine (Seroquel)

Method Name

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

Reporting Name

Quetiapine (Seroquel), Serum

Specimen Type


Specimen Required

Submit only 1 of the following specimens:



Draw blood in a green-top (sodium heparin) tube(s), plasma gel tube not acceptable. Spin down and send 3 mL sodium heparin plasma refrigerated in a plastic vial.



Draw blood in a plain red-top tube(s), serum gel tube is not acceptable. Spin down and send 3 mL of serum refrigerated in a plastic vial.

Specimen Minimum Volume

0.6 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Varies Refrigerated (preferred) 14 days
  Frozen  180 days
  Ambient  72 hours

Reference Values

Units:    ng/mL


Therapeutic and toxic ranges have not been established. Expected steady-state Quetiapine plasma levels in patients receiving recommended daily dosages: 100 - 1000 ng/mL.


Day(s) Performed

Monday through Sunday

Performing Laboratory

Medtox Laboratories, Inc.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
FQUET Quetiapine (Seroquel), Serum 26776-5


Result ID Test Result Name Result LOINC Value
Z1216 Quetiapine (Seroquel), Serum 26776-5

Test Classification

This test was developed and its performance characteristics determined by LabCorp. It has not been cleared or approved by the Food and Drug Administration.

Report Available

5 to 9 days

NY State Approved