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Oral fluid drug testing certifications & cutoff levels

Oral fluid drug testing panels and cutoffs

Our employer oral fluid drug testing panels detect commonly abused drugs and yield reliable results, meaning you can screen with confidence.


A two-tiered testing process ensures that positive oral fluid drug test results are re-checked and confirmed. The initial oral fluid specimen is screened using enzyme immunoassay (EIA), a proven reliable methodology for routine testing.


Any samples that are presumptively positive in the initial tests are confirmed, utilizing another portion of the oral fluid specimen, using either gas chromatography/mass spectrometry (GC/MS) or gas chromatography/mass spectrometry/mass spectrometry (GC/MS/MS) technology. 


Quest Diagnostics Employer Solutions drug testing locations hold and maintain CAP, Substance Abuse and Mental Health Services Administration (SAMSHA), and Clinical Laboratory Improvement Amendments of 1988 (CLIA-88) certification as well as any applicable state licensure. 

Employers can test for a wide range of drugs:

Drug class

Screen cutoff

Confirmation cutoff


150 ng/mL

120 ng/mL


15 ng/mL

6 ng/mL

Marijuana (THC)

3 ng/mL

1.5 ng/mL


120 ng/mL

120 ng/mL


Codeine, morphine, hydrocodone,
hydromorphone, 6-AM

30 ng/mL


30 ng/mL*


oxycodone, and oxymorphone
30 ng/mL 30 ng/mL

 Phencyclidine (PCP)

 3 ng/mL

1.5 ng/mL

*Confirmatory testing is 3 ng/mL for 6-AM.

View the Quantisal™  collection instructions.

Download our Quantisal™ brochure or read our FAQs.