![]() ![]() Drug Toxicology Monitoring Fentanyl, Quantitative, Urine. ![]() Initial screen of the Cocaine Metabolite drug class. Our Test Directory includes detailed information, guides and references for many of our tests. If this test code is not ordered with 39158, all medMATCH result codes will be DNR’d. Drugs/metabolites can be reported as either the name (qualitative) or the name and concentration (quantitative). Drug Toxicology Monitoring Fentanyl, Quantitative, Urine. If 39158 is ordered, all Drug Monitoring order codes will be treated as medMATCH.Used when a definitive concentration of a drug is needed to guide management (e.g., discontinuation of THC use according to a treatment plan).Used to identify specific substances or metabolites that are not detected by presumptive methods, including gabapentin, pregabalin, tapentadol, tramadol, synthetic cannabinoids, and other synthetic/analog drugs.They can identify patterns of misuse presumptive tests might miss. Quest Diagnostics classifies analytes and/or drugs at the parent and child level. For example, a substance abuse panel (SAP) that includes the parent drug opiates will also test for its children. Quest Diagnostics classifies analytes and/or drugs at the parent and child level. Performed with advanced laboratory technologies, definitive tests are more accurate than presumptive tests as they detect at a lower concentration. In regard to drug testing, panel is used to describe a drug or family of drugs that are included in the screening of a drug test.Definitive testing has high sensitivity and is used to confirm or refute presumptive test results or for testing where presumptive tests are not available and reduces the occurrence of false-positive/false-negative results. Definitive drug tests are used to identify specific drugs/metabolites present.
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