Andrew Ryan

About

Andrew Michael Ryan is the Provost's Professor of Health Services, Policy, and Practice at Brown University and serves as the Director of the Center for Advancing Health Policy through Research. His research primarily focuses on understanding and evaluating the effects of health care payment reform. He has performed extensive work evaluating national programs aimed at improving the quality and value of health care by altering incentives faced by hospitals, physician practices, Accountable Care Organizations, and Medicare Advantage plans. Much of his work involves detailed econometric analysis of longitudinal data. Dr. Ryan has also contributed to policy development through participation on national technical expert panels and steering committees, gaining a deep understanding of the policy issues related to the use of financial incentives to improve health care spending value in the United States.

Research topics

• Medicine
• Finance
• Business
• Actuarial science
• Surgery
• Economic growth
• Economics
• Computer Science
• Internal medicine
• General surgery

Selected publications

• Favorable Selection In Medicare Advantage Is Linked To Inflated Benchmarks And Billions In Overpayments To Plans

  Health Affairs · 2023 · 25 citations

  1st authorCorresponding

  Increases in Medicare Advantage (MA) enrollment, coupled with concerns about overpayment to plans, have prompted calls for change. Benchmark setting in MA, which determines plan payment, has received relatively little attention as an avenue for reform. In this study we used national data from the period 2010-20 to examine the relationships among unobserved favorable selection, benchmark setting, and payments to plans in MA. We found that unobserved favorable selection in MA led to underpayment t…

  PublisherDOI

• A New Medicare Agenda—Moving Beyond Value-Based Payment and the Managed Care Paradigm

  JAMA · 2025-02-20 · 6 citations

  articleSenior author

  This Viewpoint discusses how a new governing agenda could reorient Medicare toward patients and clinicians rather than the traditional structure of value-based payment and managed care.

  PublisherDOI

• Difference‐in‐Differences for Health Policy and Practice: A Review of Modern Methods

  Statistics in Medicine · 2025-10-01 · 6 citations

  review

  Difference-in-differences (DiD) is a popular observational causal inference method in health policy, employed to evaluate the real-world impact of policies and programs. To estimate treatment effects, DiD relies on a "parallel trends assumption" that treatment and comparison groups would have had parallel trajectories on average in the absence of an intervention. Recent years have seen both growing use of DiD in health policy and medicine and rapid advancements in DiD methods. To support DiD imp…

  PublisherDOI

• Reconciliation Payments in the Bundled Payments for Care Improvement Advanced Program and Reductions in Clinical Spending Needed for CMS to Avoid Financial Losses

  JAMA · 2023 · 5 citations

  1st authorCorresponding

  This study examines the magnitude of reconciliation payments and clinical spending reductions necessary for the Centers for Medicare & Medicaid Services to break even in the first 4 performance periods of the BPCI-A (Bundled Payments for Care Improvement Advanced) program.

  PublisherOA PDFDOI

• Rhode Island’s Affordability Standards Led To Hospital Price Reductions And Lower Insurance Premiums

  Health Affairs · 2025-05-01 · 2 citations

  article1st authorCorresponding

  Beginning in 2010, Rhode Island's affordability standards capped hospital price growth for the fully insured commercial segment of the state's health insurance market. The long-term impact of the standards on hospital prices and insurance markets is unknown. We used a series of national data sources from the period 2006-22 to compare hospital prices and margins and insurer premiums and fees in Rhode Island and comparison states before and after the initiation of the standards in 2010. Our study…

  PublisherDOI

Recent grants

• Evaluating the Effects of HACRP

  NIH · $2.3M · 2018–2024

• Estimating Hospital Outcome Quality: Applications to Pay-for-Performance

  NIH · $742k · 2010–2015

• The Effects of Bundled Payment on Acute Cardiovascular Outcomes Among Older Adults

  NIH · $4.4M · 2015–2027

Frequent coauthors

• Justin B. Dimick

  University of Michigan–Ann Arbor

  84 shared

• Brahmajee K. Nallamothu

  42 shared

• Ushapoorna Nuliyalu

  VA Ann Arbor Healthcare System

  31 shared

• John M. Hollingsworth

  NorthShore University HealthSystem

  30 shared

• Jyothi R. Thumma

  University of Michigan–Ann Arbor

  29 shared

• David J. Meyers

  Brown University

  28 shared

• Karan R. Chhabra

  Beaumont Hospital, Royal Oak

  27 shared

• Adam A. Markovitz

  University of Michigan–Ann Arbor

  20 shared

Education

• Ph.D.

  University of Michigan

Similar researchers at Brown University

• Vincent Morh-127
• James Rudolphh-96
• Ethan Balkh-92