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Except when a client agrees that outside expertise would be beneficial, all work for clients is performed directly by the HPA principals, who have a long and varied history working for the U.S. Congress, the Department of Health and Human Services, and health care organizations. The principals offer diverse academic backgrounds, including individuals with advanced degrees in medicine, law, business, public health, political science, public policy/operations research and public administration.

Thomas Ault

Thomas A. Ault joined HPA in 1997 after many years of legislative, budgetary and regulatory leadership in health policy. He was director of the Health Care Financing Administration's policy bureau from 1993 to 1997, and was its deputy director from 1988 to 1993. During that period, he led policy development for numerous Medicare and Medicaid changes including coverage of new technology, inpatient and outpatient hospital prospective payment, physician practice expense and other fee schedule policies, and nursing home and home health policies. Prior to joining the policy bureau, Tom was director of policy analysis for HCFA's (now CMS) legislative office. He directed the agency's technical and legislative assistance on the three reconciliation laws enacted from 1985 through 1987, as well as on the Medicare catastrophic coverage and prescription drug law of 1988. Before joining HCFA in 1984, Tom worked for nine years in the Secretary's policy office (ASPE) in a variety of senior positions on welfare and social security issues. He is a graduate of the University of Maryland, with a bachelor's degree in mathematics, and of George Washington University, with a master's degree in public policy/operations research.


Henry Desmarais, M.D.

Henry R. Desmarais, M.D., was a principal at HPA from 1987 to 1998 and rejoined the firm in the fall of 2004. Between his two stints at HPA, he served as Senior Vice President of Policy and Information for the Health Insurance Association of America, and earlier as Director of the Health Policy and Advocacy Department of the American College of Surgeons. Before joining HPA for the first time, Henry held several senior positions in the agency now known as the Centers for Medicare and Medicaid Services, where he specialized in quality of care, payment and technology assessment issues. He also held staff positions in the U.S. House of Representatives and the U.S. Senate, including staff director of the Senate Subcommittee on Alcoholism and Drug Abuse. His background also includes service on the American Medical Association's CPT Editorial Panel, the National Uniform Billing Committee and the National Uniform Claim Committee. Henry earned his M.D. from the Yale University School of Medicine and his Master of Public Administration degree from George Washington University.


Beth Fuchs, Ph.D.

Beth C. Fuchs, Ph.D., joined HPA in 1998 after eleven years at the Congressional Research Service (CRS), where she assisted the Congress in developing and analyzing health legislation and wrote numerous reports on major health policy issues. Her areas of specialization included private health insurance, regulation of managed care, employee health benefits (including ERISA), Medicare, and health system reform. She also had extensive involvement in major legislation, including numerous budget reconciliation bills and the Health Insurance Portability and Accountability Act. Before going to CRS, Beth served as a professional staff member for the Senate Special Committee on Aging and as a legislative assistant for a member of the House of Representatives. She was awarded an American Political Science Association Congressional Fellowship in 1981-82. Beth also taught political science and public policy at Duke University and the University of North Carolina at Chapel Hill. She received her M.Sc. in politics from the London School of Economics and her Ph.D. in political science from the University of North Carolina at Chapel Hill.


Jean Hearne

Jean Hearne joined HPA in 2014 after working more than twenty years as a policy advisor to the United States Congress. Twelve of those years were at the Congressional Budget Office (CBO) and ten at the Congressional Research Service. Most recently, she served as the chief of the Low-Income Health Programs and Prescription Drugs cost estimating unit of CBO. There, Jean led a team of analysts specializing in analyzing the budgetary and policy effects of legislation affecting Medicaid, the Children’s Health Insurance Program (CHIP), health programs established under the Affordable Care Act (ACA), and many other programs. She has had extensive involvement in major legislation, including the ACA, legislation establishing the CHIP program, as well as numerous budget reconciliation bills. As a Medicaid financing expert Jean has authored a large number of reports for Congress on Medicaid subjects. She earned an M.P.H. from San Diego State University and a B.A. from the University of Rochester. Email:


Marjorie Kanof, M.D.

Marjorie Kanof, M.D. joined HPA in 2011 after 14 years in the federal government. Immediately prior to joining the firm, she was the Managing Director for Health Care at the Government Accountability Office (GAO). In that role, she was responsible to Congress for testimonies and reports covering the complete range of health care issues. She also provided leadership for implementation of portions of health care legislation. Before moving to the GAO in 2001, Marjorie worked at the Centers for Medicare and Medicaid Services (CMS) and held a variety of positions including Deputy Director for Medicare Payment Policies and Deputy Director for Medicare Contractors. In these positions, she provided leadership for development and implementation of Medicare payment policies and related program integrity issues. Before entering government service, Marjorie was the Medicare Medical Director at Blue Cross Blue Shield of Massachusetts. In that role, she was responsible for developing local medical review policies for several Medicare products and was involved in national committees focused on physician payment. Marjorie's medical background includes both academic and clinical components. She was NIH funded in the field of immunology. She held a faculty position at the Harvard Medical School and was faculty in pediatric gastroenterology at the Massachusetts General Hospital. She trained in pediatrics and pediatric gastroenterology at the Johns Hopkins Hospital. Marjorie earned a Masters in Public Health with a concentration in health care management from the Harvard School of Public Health. She earned her M.D. from the University of Kansas.

Pierre Poisson

Pierre Poisson, J.D. joined HPA in 2008 after more than 13 years providing legal and legislative drafting services with respect to U.S. health entitlement laws and other areas of federal law. In 2005, Pierre formed his own company providing policy analysis, procedural counsel, and drafting services for clients seeking assistance in developing legislation involving Medicare and Medicaid payments to providers and suppliers as well as for clients seeking improvements in health care services and other benefits under law for service members and veterans of the U.S. Armed Forces. Until 2005, he served as Assistant Counsel in the Office of the Legislative Counsel, U.S. House of Representatives, where for ten years he provided policy analysis and drafted legislation in the areas of Medicare, Medicaid, veterans’ benefits, and the U.S. intelligence community. He previously served as a judicial clerk for a U.S. Tax Court judge. He earned a law degree from the Dickinson School of Law and his BA from Middlebury College.


Lisa Potetz

Lisa A. Potetz came to HPA in 2006 with more than 25 years of health policy experience in both the public and private sectors. Immediately before joining the firm, she spent eight years at the March of Dimes developing and managing a public policy research program focused on health insurance coverage and other issues of importance to women of childbearing age and children. She also authored a number of reports on Medicare trends and reform proposals as an independent consultant. She previously spent two years on the policy staff of the American Hospital Association, examining the impact of federal budget proposals on hospitals. Her government experience includes service as a professional staff member to both the Senate Committee on Finance and the Subcommittee on Health of the House Committee on Ways and Means, developing legislation involving Medicare payment to hospitals and other providers, health insurance, and health care reform. Prior to her time on Capitol Hill, Lisa was an analyst at the Prospective Payment Assessment Commission. She began her career at the Congressional Budget Office, providing analytic support to Congress during consideration of the original Medicare inpatient hospital prospective payment legislation. She earned a BA from Boston College and a Master's in Public Policy from the University of Michigan.

Thomas Walke
Thomas Walke, Ph.D. joined HPA in 2013 after 10 years of federal government experience. Prior to joining the firm, he was an Assistant Director for Health Care at the United States Government Accountability Office (GAO). In this role, he was responsible for assisting the Congress in developing reports and testimonies on a wide range of health care topics including Medicare payment and financing issues, Medicare program integrity, and the Department of Veterans Affairs and Department of Defense health care systems. Thomas also has served as Deputy Director for the Center for Sustainable Health Spending at Altarum Institute. In this role, he led research projects involving the macroeconomics of health spending, workforce, prices, and long-term fiscal sustain-ability. He also served as Practice Area Leader of Forecasting and Economic Analyses at Altarum, conducting and supporting economic analyses for government and private sector clients, including analyses of new diagnostic technologies, among other responsibilities. His background includes health economics, program evaluation, and other quantitative and qualitative methods. He earned a Master of Science in Public Health and a Ph.D. in health policy and administration from the University of North Carolina School of Public Health.