The Centers for Medicare and Medicaid Services (CMS) named Leslie Norwalk as the successor to Mark McClellan as acting chief of the organization. Norwalk has served as a lawyer in both Bush administrations and has also been a part of CMS’s senior leadership for five years, the Associated Press reports. In this capacity, she will have oversight over federal healthcare programs for elderly and low-income individuals. Norwalk will oversee CMS until President Bush nominates a permanent replacement for McClellan. First on her to-do list will be the Nov. 15 start of the next enrollment period for the prescription drug benefit.