Implementing computerized provider order entry with an existing clinical information system.

Background: There are numerous barriers to successfully implementing computerized provider order entry (CPOE), and it is not entirely clear to what degree the proposed benefits extend to older, commercially available systems in place at most hospitals.

Methods: In 2000, Loyola University Health System leadership chartered a project to implement CPOE for hospitalized patients' medications. The impact of CPOE on workflow was analyzed before implementation.