Bipartisan Team

Dean A. Rosen

Dean A. Rosen


A partner at Mehlman Castagnetti Rosen & Thomas, Dean is one of Washington’s foremost experts on America’s complex health care system – and a master of both the politics and policies that shape it. Dean has more than two decades of experience developing and advancing health policy initiatives on Capitol Hill and in the private sector. At Mehlman Castagnetti, he advises a wide range of clients, from leading businesses and trade associations to universities and not-for-profit organizations. He has represented hospitals and health systems, physician specialty organizations, private health plans, clinical laboratories, biotechnology companies, pharmaceutical manufacturers, as well as national employers. He guides each as they seek to impact national health policy and navigate the transformational health system changes taking place in the aftermath of the Affordable Care Act.

Prior to joining Mehlman Castagnetti, Dean held a series of high-level positions in both the private sector and government, including on key committees in both the United States Senate and House of Representatives. As the chief health care advisor to then- Senate Majority Leader Bill Frist, M.D. (R-TN), a leading voice on national medical and health issues, Dean helped draft and navigate to final passage landmark legislation creating a Medicare prescription drug benefit, patient safety legislation, and laws in the wake of the September 11th and bioterrorism attacks in 2001 to ensure that local, state and national public health systems had new authorities and additional resources to respond to future threats. Before working for the Senate Majority Leader, Dean served as staff director for the Senate Subcommittee on Public Health, majority counsel for the House Ways and Means Health Subcommittee, and health policy coordinator for the Senate Committee on Labor and Human Resources (now the Senate Health, Education, Labor and Pensions Committee). At Ways and Means, he played a leading role in crafting the Medicare provisions of the Balanced Budget Act of 1997. At Labor, he was the lead Senate staffer in drafting the Health Insurance Portability and Accountability Act of 1996 (HIPAA).

Dean’s policy, legal and management experience also ranges beyond Capitol Hill. He served as senior vice president of policy and general counsel for the Health Insurance Association of America (HIAA), and practiced law at Dow, Lohnes and Albertson in Washington, D.C.

Dean holds a J.D. from Syracuse University Law School, a Master’s Degree from Syracuse University S.I. Newhouse School of Public Communications, and a B.S. from Boston University. He is a member of the Board of Directors at the David A. Winston Health Policy Fellowship, and an Associate Professor at the George Washington University School of Public Health.