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25101 Risperidone and 9-Hydroxyrisperidone (757)

Risperidone and 9-Hydroxyrisperidone (757)
Test Code: RISPRSO
Synonyms/Keywords
​Risperdal®
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 ​
Collection Processing Instructions
Trough levels are most reproducible​
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 Friday​ 3 days​
Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS)​
Reference Lab
Medtox Laboratories
Reference Range Information
Reference Range
Risperidone, ng/ml
Report Limit
0.5 ng/ml
 
9-Hydroxyrisperidone, ng/ml
Report Limit
0.5 ng/ml
 
Risperidone and metabolite, ng/ml
Reference Range
10 - 120 ng/ml
 
Message:  Expected steady state concentrations of risperidone and 9-hydroxyrisperidone (combined total) in patients receiving recommended daily dosages: 10 - 120 ng/ml.​
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
​80342 ​ ​1 ​ ​
​G0480 ​ ​1 ​ ​Medicare/MA
Synonyms/Keywords
​Risperdal®
Ordering Applications
Ordering Application Description
​Centricity ​Rispridone & 9-Hydroxyrisperidone (757)
​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 ​
Collection Processing
Trough levels are most reproducible​
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
Reference Range
Risperidone, ng/ml
Report Limit
0.5 ng/ml
 
9-Hydroxyrisperidone, ng/ml
Report Limit
0.5 ng/ml
 
Risperidone and metabolite, ng/ml
Reference Range
10 - 120 ng/ml
 
Message:  Expected steady state concentrations of risperidone and 9-hydroxyrisperidone (combined total) in patients receiving recommended daily dosages: 10 - 120 ng/ml.​
For more information visit:
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Medtox Laboratories​ Performed Monday through Friday​ 3 days​
Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS)​
Reference Lab
Medtox Laboratories
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.