Phase III Attribution Changes: Accountable Care Collaborative

This document outlines the changes in attribution methodology for the Accountable Care Collaborative (ACC) Phase III, set to launch in July 2025. It explains the processes for member assignment to primary care medical providers and regional accountable entities, emphasizing member choice and utilization. Notable changes include the removal of geographic and family attribution to better reflect provider-patient relationships. The updated methodology aims to enhance care coordination and clarity for both members and providers.