According to the OIG, 57% of Medicare physicians used an electronic health record (EHR) system at their primary practice location in 2011, based on a sample of 2,000 physicians who provided at least 100 evaluation and management (E/M) services in 2010.  Almost one quarter of physicians (22%) first began using EHR systems to document E/M services in 2011, the first year of the Medicare EHR incentive payment program.  The OIG also reports that 73% of Medicare physicians with an EHR system used a certified system to document E/M services.  The OIG speculates that physicians will likely continue to adopt and implement certified EHR technology to avoid Medicare payment reductions starting in 2015.