Medicare coverage of medical devices in the U.S. sometimes is limited to a coverage with evidence development (CED) study, a process that may soon become more stringent. A recent advisory hearing on the CED process suggests that significant changes may be in the making, including a requirement that CED studies more closely reflect the demographic diversity of Medicare beneficiaries at large, a mandate that may force device makers to apply more resources to ensure that CED study enrollments fulfill that mandate.