The Comprehensive Care for Joint Replacement (CJR) model was finalized by CMS on November 16, 2015, implementing a new payment model for lower extremity joint replacement procedures, with the first performance period starting April 1, 2016, in 67 metropolitan statistical areas. Major changes from the proposed rule include adjustments to payment methodologies, accountability measures for hospitals, and protections for rural facilities, alongside specific quality measures to determine hospitals' eligibility for reconciliation payments. The model aims to reduce costs and improve care quality through a bundled payment approach while maintaining beneficiaries' freedoms and ensuring their access to necessary services.