Marc Hartstein, MA, came to Health Policy Alternatives in Washington, D.C. after 26 years with CMS. Hartstein held several management and staff positions during his time at CMS, most recently as the director of the Hospital and Ambulatory Policy Group. At CMS, Hartstein was central to the development of MS-DRGs, the 2-midnight rule, Medicare’s policy for off-campus hospital outpatient departments, the misvalued code initiative, and regulations to implement Medicare’s new clinical laboratory fee schedule, among other policies. Hartstein’s experience spans both the executive and legislative branches of the government. He has assisted in the drafting of legislation, working with the congressional committees that have subject matter jurisdiction over Medicare.