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Code of Federal Regulations

Subpart G

Medical Review Officers and the Verification Process

40.121Who is qualified to act as an MRO?40.123What are the MRO's responsibilities in the DOT drug testing program?40.125What relationship may an MRO have with a laboratory?40.127What are the MRO's functions in reviewing negative test results?40.129What are the MRO's functions in reviewing laboratory confirmed non-negative drug test results?40.131How does the MRO or DER notify an employee of the verification process after receiving laboratory confirmed non-negative drug test results?40.133Without interviewing the employee, under what circumstances may the MRO verify a test result as positive, or as a refusal to test because of adulteration or substitution, or as cancelled because the test was invalid?40.135What does the MRO tell the employee at the beginning of the verification interview?40.137On what basis does the MRO verify test results involving marijuana, cocaine, amphetamines, semi-synthetic opioids, or PCP?40.139On what basis does the MRO verify test results involving 6-acetylmorphine, codeine, and morphine?40.141How does the MRO obtain information for the verification decision?40.143[Reserved]40.145On what basis does the MRO verify test results involving adulteration or substitution?40.147[Reserved]40.149May the MRO change a verified drug test result?40.151What are MROs prohibited from doing as part of the verification process?40.153How does the MRO notify employees of their right to a test of the split specimen?40.155What does the MRO do when a negative or positive test result is also dilute?40.157[Reserved]40.159What does the MRO do when a drug test result is invalid?40.160What does the MRO do when a valid test result cannot be produced and a negative result is required?40.161What does the MRO do when a drug test specimen is rejected for testing?40.162What must MROs do with multiple verified results for the same testing event?40.163How does the MRO report drug test results?40.165To whom does the MRO transmit reports of drug test results?40.167How are MRO reports of drug results transmitted to the employer?