Greg Peterson

Gregory Peterson

Principal Researcher
  • Evaluation design
  • Quasi-experimental design
  • Effectiveness of care coordination and disease management
  • Primary care
Focus Areas
  • Health
  • Delivery System Reforms
  • Disability
  • Long-Term Services and Supports
  • Medicaid and CHIP
  • Medicare
  • Human Services
About Gregory

Gregory Peterson has technical and substantive interest in the effectiveness of care coordination and disease management for people with chronic illnesses; studying approaches for improving the delivery of primary care and assessing their effectiveness; and approaches for helping people who need long-term care services and supports live independently in their communities.

Peterson currently serves as the project director of a multiyear evaluation of the Extended Medicare Coordinated Care Demonstration. This project is analyzing qualitative information, estimating program impacts on Medicare service use and costs and quality of care, and synthesizing implementation findings and impact estimates to draw inferences about program features that contributed to improved outcomes. In addition, he is a task leader for an evaluation of primary care redesign initiatives funded through the Center for Medicare & Medicaid Services Health Care Innovation Awards. Peterson also leads an assessment of the impacts of waiting periods for Medicaid home and community-based services on consumers and Medicaid costs.

Before joining Mathematica in 2008, Peterson served as an analyst for the Government Accountability Office. He holds a Ph.D. in health policy from the School of Public Policy and Administration at George Washington University and an M.P.A. from the Woodrow Wilson School of Public and International Affairs at Princeton University.

Key Projects
  • Medicare Coordinated Care Demonstration

    Mathematica tested whether care coordination and disease management programs in the fee-for-service setting lower Medicare expenditures, or increase the quality of health care services and beneficiary and provider satisfaction without increasing expenditures for beneficiaries with chronic illnesses....

  • HCIA Evaluations: Primary Care Redesign

    Mathematica evaluated the 14 primary care redesign programs, which operate at different levels (that is, physician practices, hospitals, or health systems). The evaluation team assessed improvements in the coordination, efficiency, and quality of patient care.

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