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www.aapc.com/blog/42806-coding-presumptive-drug-testing

Presumptive drug testing services may be performed prior to definitive drug screen testing (80320-80377), when a provider wants to rule out illicit drug uses or to confirm the presence of a particular drug class without identifying individual drugs; or, to distinguish between structural isomers.

science.howstuffworks.com/forensic-lab-technique2.

Forensic labs are often called in to identify unknown powders, liquids and pills that may be illicit drugs. There are basically two categories of forensic tests used to analyze drugs and other unknown substances: Presumptive tests (such as color tests) give only an indication of which type of substance is present -- but they can't specifically identify the substance.

en.wikipedia.org/wiki/Presumptive_and_confirmatory_tests

Most people who take a drug test take a presumptive test, cheaper and faster than other methods of testing. However, it is less accurate and can render false results. The FDA recommends for confirmatory testing to be conducted and the placing of a warning label on the presumptive drug test: "This assay provides only a preliminary result.

www.reference.com/world-view/presumptive-test-79d6a1c50957d9f8

What Is a Presumptive Test? Presumptive tests are used to determine whether a specific chemical is present in a solution. These tests are commonly used to detect whether someone has drugs in their system. A presumptive test indicates whether there has been a reaction between a substance and a particular chemical. It will demonstrate this ...

www.forwardhealth.wi.gov/WIPortal/Subsystem/KW/Print.aspx?ia=1&p=1&sa=32&s=2&c=...

Testing for Drugs of Abuse Covered Services. Providers are required to use HCPCS Level I and Level II procedure codes 80305–80307, G0480–G0483, and code G0659 when submitting claims for testing for drugs of abuse. Codes 80305–80307, G0480–G0483, and G0659 consist of two primary categories of drug testing: presumptive and definitive.

www.sog.unc.edu/sites/www.sog.unc.edu/files/course_materials/Presumptive and...

Presumptive and Confirmatory Forensic Tests Definitions: ... presumptive test. See the Drug Chemistry Section Policy and Procedure Manual – Criteria for the Analysis and Identification of Controlled Substances for the limitations of screening tests. See also the Scientific Working Group on the Analysis of Seized Drugs (SWGDRUG)

en.wikipedia.org/wiki/Drug_testing

Presumptive substance testing ... Drug-testing a blood sample measures whether or not a drug or a metabolite is in the body at a particular time. These types of tests are considered to be the most accurate way of telling if a person is intoxicated. Blood drug tests are not used very often because they need specialized equipment and medically ...

answersdrive.com/what-is-a-presumptive-test-for-a-drug-7334132

There are two main types of tests used to determine whether an illegal drug is present in a substance: presumptive tests and confirmatory tests. Presumptive tests are less precise and indicate that an illegal substance may be present. Confirmatory tests provide a positive identification of the substance in question.

drugs-forum.com/threads/what-exactly-does-a-presumptive-positive-mean-on-a...

Drug screens which have a positive result must go through confirmation testing before the 'positive' is really accepted as positive. Drug screens may give false positives, but a confirmation test will clear up any false positive. Confirmation tests are not vulnerable to false positives, but they are much more sophisticated, time consuming, and ...

www.questdrugmonitoring.com/blog/presumptive-drug-testing-rapid-results-for...

“A presumptive test is a qualitative test used to detect the possible presence of a drug or drug class,” he explained, based on the definition issued by the American Medical Association in 2015. “Definitive” testing is a qualitative or quantitative procedure that identifies the specific drugs and associated metabolites.