Department of Health and Human Services in the Office of the General Counsel. In that role, Mr. Mannchen represents the Centers for Medicare & Medicaid Services (CMS) in federal district court litigation. His portfolio includes challenges to the Medicaid Drug Rebate Program, reimbursement for prescription drugs under Medicare Part B and Part D, decisions of the Provider Reimbursement Review Board, and Medicaid section 1115 demonstration projects. Before joining HHS, Mr. Mannchen clerked for Judge Roger Wollman on the U.S. Court of Appeals or the Eighth Circuit. Mr. Mannchen is a 2015 summa cum laude graduate of American University Washington College of Law.