DOT-mandated testing for controlled substances is not part of the physical qualification examination process and is not mandated by FMCSA. Such testing falls under 49 CFR 40, which mandates the drug and alcohol testing procedures for conducting workplace drug and alcohol testing for the Federally regulated transportation industry.
MEs are not prohibited from conducting non-DOT drug/alcohol testing as a part of the medical certification process (e.g., to confirm a clinical diagnosis of alcoholism, or if the driver reports past use of illicit drugs) to assist in making a qualification determination.
The non-DOT drug and or alcohol testing process does not require the use of a certified Substance Abuse Professional (SAP) under the provisions of Part 40 or 49 CFR § 382 Controlled substances and alcohol use and testing of the FMCSRs. Drivers may be required to provide documentation from a professional qualified to render a substance abuse evaluation or an opinion concerning successful treatment received from an appropriate rehabilitation program.