Laboratory Question for the Week of March 20, 2017

Laboratory Compliance Question of the Week


What is the difference between a presumptive lab test and a definitive lab test?


Presumptive tests are used to identify possible use or non-use of a drug or drug class (i.e., the presence or absence of a drug in a urine sample). Qualitative or quantitative methods that identify possible drug use or non-use and identify the specific drugs and associated metabolites are definitive tests.

Disclaimer: Every reasonable effort was made to ensure the accuracy of this information at the time it was published. However, due to the nature of industry changes over time we cannot guarantee its validity after the year it was published.