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25151 Quetiapine, Serum (423)

Quetiapine, Serum (423)
Test Code: QUETSO
Synonyms/Keywords
Seroquel®​
Specimen Requirements
Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)
Pediatric Minimum Volume
(no repeat)
Serum​ ​Red Top Tube (RTT) ​3 mL ​0.6 mL
​Plasma ​Lithium-heparin Green Top Tube or Sodium-heparin Green Top Tube (GTT) ​3 mL ​0.6 mL
Specimen Stability Information
Specimen Type Temperature Time
​Serum or Plasma ​ Ambient temperature is acceptable for shipping and/or short-term storage ​ 3 days​
Specimen may also be refrigerated or frozen for longer storage​
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Medtox Laboratories​ Performed Monday through Saturday​ 5 days​
Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS)​
Reference Lab
Reference Range Information
Performing Location Reference Range
Medtox Laboratories​
Report Limit
10 ng/ml
Reference Range
100 - 1000 ng/ml
Message:  Therapeutic and toxic ranges have not been established. Expected steady-state quetiapine plasma levels in patients receiving recommended daily dosages: 100 - 1000 ng/ml.​
Outreach CPTs
CPT Modifier
(if needed)
Quantity Description Comments
​80342 ​1
​G0480 ​1 ​Medicare/MA
Synonyms/Keywords
Seroquel®​
Ordering Applications
Ordering Application Description
​Centricity ​Quetiapine, Serum (423)
​Cerner ​None
If the ordering application you are looking for is not listed, contact your local laboratory for assistance.
Specimen Requirements
Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)
Pediatric Minimum Volume
(no repeat)
Serum​ ​Red Top Tube (RTT) ​3 mL ​0.6 mL
​Plasma ​Lithium-heparin Green Top Tube or Sodium-heparin Green Top Tube (GTT) ​3 mL ​0.6 mL
Specimen Stability Information
Specimen Type Temperature Time
​Serum or Plasma ​ Ambient temperature is acceptable for shipping and/or short-term storage ​ 3 days​
Specimen may also be refrigerated or frozen for longer storage​
Reference Range Information
Performing Location Reference Range
Medtox Laboratories​
Report Limit
10 ng/ml
Reference Range
100 - 1000 ng/ml
Message:  Therapeutic and toxic ranges have not been established. Expected steady-state quetiapine plasma levels in patients receiving recommended daily dosages: 100 - 1000 ng/ml.​
For more information visit:
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Medtox Laboratories​ Performed Monday through Saturday​ 5 days​
Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS)​
Reference Lab
For billing questions, see Contacts
Outreach CPTs
CPT Modifier
(if needed)
Quantity Description Comments
​80342 ​1
​G0480 ​1 ​Medicare/MA
For most current information refer to the Marshfield Laboratory online reference manual.