West Linn, OR 97068; Phone (503) 635 - 8384; Fax (503) 636 - 6475; Click below to access your Patient Portal (available for current patients) Quest Diagnostics. Hours: 7:30am - 5:00pm Monday - Thursday. 7:30am - 4:00pm Friday. 18380 Willamette Drive, Suite 101 West Linn, Or 97068. 503-675-1609 phone 503-635-1056 fax.