Quest DiagnosticsWrite a Review530-458-7676Be the first to review!520 Oak St, Colusa, CA 95932Hi there!Be the first to review!5First-class4Better than most3About what I expected2Not the worst...1DisappointingClick to RateMore Business InfoHoursDo you know the hours for this business?Other Linkhttp://www.questdiagnostics.comCategoryMedical Labs Suggest an Edit