Rapid screenings done in our facility or at the laboratory use the same methodology, enzyme-linked immunoassay. The laboratory uses an automated process to perform the screens. If a lab-based screen is presumptive positive, it can then be immediately sent to confirmation testing. Lab-based drug screens also cover confirmations and medical review, if needed. Rapid drug screen specimens can also be sent to the laboratory for confirmation if the results are presumptive positive. An additional fee is then charged for this service. Medical review is also available for an additional fee.