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Silverton Hospital

24-hour emergency care

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In an emergency, call 911

Non-Emergency ?

Woodburn Immediate Care

After hours walk-in care

Mon-Fri 9am-7pm
Sat 10am-4pm
Holiday 10am-4pm

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Call Now: 971-983-5360

Drug-free Workplace Services

Medical Review Officer (MRO)

If the result of a urine drug screen is “non-negative”, it must be reviewed by a Medical Review Officer (MRO).

The function of the MRO for non-negative drug tests is to determine if there is a medically valid reason to overturn a laboratory test result. For example, if an employee has a prescription for the substance that was found in his/her system, the MRO is qualified to declare the test a negative instead of a positive.

The MRO speaks with the donor directly about prescription medications or medical treatments which could have caused the laboratory result to be positive. If there appears to be a medical explanation for the result, appropriate methods are used to confirm such information. The MRO then makes a determination from all information received whether or not the test is positive.

The charge for the MRO will only be incurred on “non-negative” tests. In effect, the MRO ensures that the employer will not be terminating anyone or denying employment on the basis of a test that is actually negative for illicit drug use. In the case of an established employee, it is incumbent upon the employer to keep that individual off duty until the MRO has made a determination and the results of the drug test are final.

Urine Drug Screens (Federal & non-Federal)

  • Pre-employment
  • Reasonable Suspicion
  • Random
  • Post-accident

Doners are required to bring a photo ID and to refrain from drinking fluids during the 2 hours prior to the test.

Breath-Alcohol Testing

Workplace Substance Abuse Training

  • Department of Transportation (DOT) Reasonable Suspicion Supervisor Training
  • Non-DOT Reasonable Suspicion Supervisor Training


Monday–Friday, 8 am–7pm
Saturday, 10 am–4 pm

For more information, call 971.983.5340.

"Business Health Services has allowed us to comply with the FAA drug testing mandate at a great price and made it very easy."

Dewey Conroy, Vice President – Pacific Coast Avionics Corporation


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