Author: Humberto Gutierrez

Drug Testing

A closer look: Drug testing panels

January 21, 2020 By

With hundreds of different combinations of detectable drugs and cutoff levels, there’s a urine testing panel for almost any reason for drug testing.

Reasons for Testing

A closer look: Random drug testing

October 4, 2019 By

Random drug testing can be a strong deterrent to drug use because it is conducted on an ongoing, unannounced basis; an employer selects one or more individuals for testing from all of the eligible employees in their testing program.

Urine testing

A closer look: specimen validity testing

March 12, 2019 By

With the use of specimen validity testing (SVT), once a specimen arrives at our laboratory, we help ensure the integrity of each test.

Blog Series

A Closer Look: Series introduction

February 8, 2019 By

A new year brings new beginnings. That said, we are excited to introduce our new blog series called A Closer Look.

Drug Testing

A Closer Look: Unit Codes and their purpose

December 14, 2018 By

Drug testing terminology is expansive and sometimes complex. For that reason we're providing clarity to one of the most commonly misused terms.

Drug Testing

Federal drug testing expanded opiate panel impacting positivity

September 13, 2018 By

The dangers associated with opioids misuse are likely elevated based on a testing population that includes drivers, pilots, and other safety-sensitive roles.

Drug Testing

Customer survey: taking action from insight

August 13, 2018 By

At Quest Diagnostics, we’re working hard to do things differently – and better.