Epic Systems, a leading provider of digital medical records, calls on large hospitals to oppose proposed US rules that would open up access to patient records (Christina Farr/CNBC)

Christina Farr / CNBC:
Epic Systems, a leading provider of digital medical records, calls on large hospitals to oppose proposed US rules that would open up access to patient records  —  - Epic Systems is urging its health system customers to take a stand against the U.S. Department of Health and Human Services' proposed rules …