All medical practices will eventually need to transition to electronic medical records (EMR) with practice management software.

The largest market share for oncology EMRs is Varian Medical Systems patient management software (www.varian.com). It has been in use since 1993 and has been adopted by oncologists world wide. Varian Medical Systems includes diagnostic imaging and radiation oncology, thus it interfaces with radiology for diagnostic and therapeutic interventions. In North Carolina , Varian Medical Systems EMR is in use at multiple large cancer centers at Gaston and Duke University .