With the calendar counting down toward Oct. 1, 2015, the Workgroup for Data Interchange on Monday circulated its latest readiness survey results, and, though the findings were positive among large health systems, some concern remains. The upshot: 90 percent of hospitals, 75 percent of health plans have begun or completed external testing, and 75 percent of IT vendors have fully completed product development. Bad news: Fewer than half of medical practices responded that they are would be ready for the switch. "In light of our most recent findings, we are hopeful that industry leaders take the necessary steps to help ensure that the transition to ICD-10 is completed with minimal disruption to the healthcare industry," WEDI Chair Jean P. Narcisi said in a statement.