Trying to figure out exactly what you'll need to do under Medicare's new enrollment revalidation push? You may want to tune in to an Oct. 27 national provider call on the issue from CMS. "Most providers and suppliers who are enrolled in the Medicare program will have to revalidate their enrollment, which will be reviewed under the new risk screening criteria required by the Affordable Care Act," CMS says in a message to providers. The revalidation applies to providers that enrolled with Medicare prior to March 25. CMS will post call-in information soon, it says. The call will take place from 12:30 to 2 pm ET.