Abbreviation: C/TPA
Consortium/Third-Party Administrator
An organization that manages DOT drug and alcohol testing programs for employers, including enrolling drivers in random testing pools and coordinating testing logistics.
Owner-operators must use a C/TPA to satisfy random testing requirements. C/TPAs also assist with Clearinghouse queries and reporting. They do not conduct the actual drug test — a certified collection site does.
Last updated: June 4, 2026