Hair testing panels and cutoffs

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

A two-tiered testing process ensures that positive drug test results are re-checked and confirmed. The initial hair specimen is screened using enzyme-linked immunosorbent assay (ELISA) technology, a proven methodology for routine screening.


Any hair test specimens that are presumptively positive in the initial tests are confirmed with another portion of the hair specimen using either the traditional GC/MS confirmation method or GC/MS/MS technology. 


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

Standard 5-panel test:

Drug class Screen cutoff Confirmation cutoff



Phencyclidine (PCP)

Marijuana (THC-COOH)
300 pg/mg

300 pg/mg

500 pg/mg

300 pg/mg

1 pg/mg
300 pg/mg

300 pg/mg

500 pg/mg

300 pg/mg

0.1 pg/mg

*Confirmatory testing is available for standard or expanded opiates.

Download our new case study about why Brazil chose to hair drug test its professional drivers. We examine the county's history of drug use, traffic-related fatalities, overall drug positivity, most commonly-detected drugs, and how U.S. testing regulations for transportation compare. 

Download our Hair Testing Specimen Procedures and Information guide.

Download our Guide to Establishing a Workplace Drug Testing Program.

Download our hair drug testing brochure and FAQs.

Download our white paper about the accuracy of hair testing.

Watch our hair drug testing video

To get started with Quest today, call 1.800.877.7484 or contact us online.