OTHER PROJECT INFORMATION – Project Summary/Abstract Does Health Insurance Promote Health through Providers and Networks? Through their varying provider networks and coverages, health insurance plans directly and indirectly steer patients toward some clinicians and hospitals and away from others. If providers differ in their quality of care and especially if they provide better care for certain types of patients, such network variation can meaningfully affect health outcomes at the plan level, and not just the provider level. Yet, consumers selecting health plans lack information about which plans will direct them to better providers, obscuring this potentially important channel to improving population health. This project will develop novel outcome-based measures of insurance plan quality based on where enrollees receive care, and taking account how causal impacts on health vary across provider networks. By furthering the scientific understanding of the relationship between provider quality and patient outcomes at the plan level, we aim to equip patients with new information for selecting insurance plans. Our measures will also provide regulators with new instruments to reward plans that make people healthier. At the core of our research plan are new, causal estimates of how mortality impacts vary across hospitals and physicians and, in turn, across the health plans that rely on different provider networks. We focus on older Americans enrolled in Medicare Advantage plans, leveraging novel data on the provider networks used by different Medicare Advantage plans. The estimates will characterize which hospitals and providers produce the best outcomes for beneficiaries with different demographics and comorbidities and thus which plans are suitable for each type of patient by directing them to providers who produce good outcomes for conditions they have or are likely to develop. The project has four primary aims: Aim 1: Measure and Validate Mortality Effects for Healthcare Providers Aim 2: Link Physician and Hospital Mortality Effects to Plan Mortality Effects Aim 3: Explore Heterogeneity in Mortality Effects Across Beneficiaries Aim 4: Evaluate the Impact of Policy Proposals

OTHER PROJECT INFORMATION – Project Narrative Health insurance plans may impact beneficiary health outcomes by steering them to higher- or lower-quality providers. We will measure the impact of different providers on health outcomes and then use detailed data on plan networks to aggregate provider-level quality scores into plan-level measures. We will analyze the degree to which these measures explain differences in plan-level mortality rates and effects. We will further measure the possible benefits of wide dissemination of these quality scores for policymaking.