So, what is a TPA or third-party administrator in the drug and alcohol testing industry? Simply put, TPA is an organization that provides direct and administrative services to help employers or other organizations manage drug and alcohol testing programs or complete workplace drug-free programs. The term Third-Party Consortium/Administrator (C/TPA) was coined by DOT in 2001 when it rewrote 49 CFR Part 40. A C/TPA providing drug and alcohol testing services to DOT must be familiar with 49 CFR procedures, part 40, please read it and read it again. Refer to this rule often to make sure you answer questions correctly and set up processes to achieve your goals.