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Test Code
CNALT
Test Name
Naltrexone, Quantitative, Urine
CPT Codes
AMA 80362, CMS G0480
Expected Turnaround Time
1 - 5 days
Clinical Utility

Useful in determining the use or abuse of Naltrexone.

Testing includes identification and quantitation of:

  • Naltrexone
  • Beta-Naltrexol (Naltrexone metabolite)
Specimen and Container Info

Preferred Specimen Type: Urine 

Preferred Collection Container: Plastic Urine Container (Preservative Free) 

Desired Specimen Volume: 10 mL 
Transport Instructions

Transport to the laboratory refrigerated.

Stability Requirements

Room Temperature

  7 Days

Refrigerated

  7 Days
Causes for Rejection

Urine specimens received in tubes containing preservatives will be rejected.
Methodology
Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
Limitations

Analyte

Cutoff Concentration (ng/mL)

Naltrexone

50

Beta-Naltrexol

50
Performing Location
Roble Road Core Laboratory
Alternate Names
  • Vivitrol
  • ReVia
Testing Schedule
Routine, daily
The American Medical Association (AMA) Current Procedural Terminology (CPT) codes published by HNL Lab Medicine are guidelines and are intended for informational purposes only. CPT coding is the exclusive responsibility of the billing entity. View the Terms.
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