Dave is a nationally recognized expert in the Medicaid and CHIP programs, their data and data systems, eligibility, services, payments, and use of these data for research, evaluation, and policy analysis. 

    Since he joined NORC, he has prepared and presented seminars on the Medicaid and CHIP programs, including eligibility, service coverage, payment methods, analytic data, and use of the data for research and policy analysis. Presentations included: program variation across states, managed care, waivers, and topics such as the opioid crisis, and the Families First Coronavirus Response Act. He wrote sections of a report for the National Center for Health Statistics (NCHS) on the linking of Transformed Medicaid Statistical Information (T-MSIS) data with NCHS survey data. In 2023, he consulted on a project to advise state Medicaid program administrators and their contracts on how to report expenditure data for selected behavioral health waivers to the Centers for Medicare and Medicaid Services (CMS). He has also provided expert input on Medicaid and CHIP data for other NORC projects and has served as an internal reviewer on draft contract proposals. 

    At CMS, as Chief of the Medicaid Program Studies Branch and Senior Technical Advisor, he developed data systems for Medicaid and CHIP person-level research data systems, such as the Medicaid Analytic eXtract (MAX) data that preceded T-MSIS. He provided guidance and training to staff of CMS’s Research Data Assistance Center and the Research Data Distribution Center; served on the CMS Privacy Board to review external research requests for MAX data; and served on CMS’s Medicaid and CHIP Business Information Solutions initiatives to redesign Medicaid reporting requirements. He initiated Inter-Agency Agreements between CMS and other agencies to link data across systems and provide richer analytic data for research. He collaborated with staff from the Assistant Secretary for Planning and Evaluation and the Census Bureau to identify reasons for the undercount of Medicaid enrollees in the Current Population Survey. He has also led research studies on Medicaid-oriented topics, such as Medicaid enrollment and expenditure trends, prescribed drugs, coverage, managed care enrollment, disability, and injuries. He also led efforts to produce Medicaid data compendiums and chart-books and served as coordinator and contributor to annual supplements of the Health Care Financing Review. At Mathematica, he led the effort to develop annual research data files for Medicaid and CHIP eligibility and service use, known as the T-MSIS Analytic Files (TAFs).