The document provides questions and answers about the proposed Medicare Shared Savings Program and Accountable Care Organizations (ACOs). It addresses concerns about limiting beneficiary care, risk-bearing requirements for ACOs, data sharing with ACOs, and ensuring various types of providers can participate, including small physician practices and rural providers. Key points addressed include that beneficiary participation in ACOs is voluntary, strong protections and monitoring are in place to prevent limiting care, risk is intensified to better meet program goals, and options aim to facilitate diverse ACO models tailored to local needs.