“American doctors use an electronic medical record (EMR) or electronic health record (EHR), according to the Centers for Disease Control. However, most of these systems are not fully functioning.
These data come from the National Ambulatory Medical Care Survey (NAMCS) which is conducted by the National Center for Health Statistics (NCHS) in the CDC. The NAMCS measures activity in physician offices including patient visits and other aspects, including use of EMRs and EHRs.”
Article
Jane Sarasohn-Kahn, Health Populi, 14 January 2010

