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Test ID: FDS9R    
Drug Screen 9 Panel, Serum or Plasma-Immunoassay Screen with Reflex to Mass Spectrometry Confirmation/Quantitation

Reference Values Describes reference intervals and additional information for interpretation of test results. May include intervals based on age and sex when appropriate. Intervals are Mayo-derived, unless otherwise designated. If an interpretive report is provided, the reference value field will state this.

Interpretive Information:  Drug Screen 9 Panel, Serum or Plasma – Immunoassay Screen with Reflex to Mass Spectrometry Confirmation/Quantitation

1.      Methodology: Qualitative Immunoassay Screen

2.      Drugs Covered and Cutoff Concentrations:

Drugs/Drug Classes

Screen Cutoff


30 ng/mL


30 ng/mL


75 ng/mL


75 ng/mL


30 ng/mL


30 ng/mL


40 ng/mL


30 ng/mL


30 ng/mL


15 ng/mL


75 ng/mL

3.      Drugs/Drug classes reported as "Positive" are automatically reflexed to mass spectrometry confirmation/quantitation testing.  An immunoassay unconfirmed positive screen result may be useful for medical purposes but does not meet forensic standards.

4.      The absence of expected drug(s) and/or drug metabolite(s) may indicate non-compliance, inappropriate timing of specimen collection relative to drug administration, poor drug absorption, or limitations of testing. The concentration at which the screening test can detect a drug or metabolite varies within a drug class. Specimens for which drugs or drug classes are detected by the screen are automatically reflexed to a second, more specific technology (mass spectrometry). The concentration value must be greater than or equal to the cutoff to be reported as positive. Interpretive questions should be directed to the laboratory.

5.       For medical purposes only; not valid for forensic use.


Test Performed by: ARUP Laboratories

                             500 Chipeta Way

                             Salt Lake City, UT 84108