According to a data brief from The Office of the National Coordinator for Health Information Technology, physicians have not made significant progress in data-sharing. The percentage of physicians who sent, received, found, and integrated health data barely grew between 2015 and 2017, going from 9 to 10 percent. Rates were markedly higher for physicians using certified EHRs than for those using non-certified ones, and for those physicians who are part of large practices.
The data brief can be obtained at https://www.healthit.gov/sites/default/files/page/2019-05/2015to2017PhysicianInteroperabilityDataBrief_0.pdf.