ACO Assignment Improvement Act of 2025

This bill changes how Medicare decides which Accountable Care Organization (ACO) a patient is linked to. Starting with performance years on or after January 1, 2027, Medicare would also count primary care services delivered by certain ACO professionals (as defined in existing law) when assigning patients to an ACO. The goal is to better reflect where people actually get their primary care, which can help ACOs coordinate care and improve outcomes for patients.

Key points:

• Who is affected: Medicare patients and clinicians participating in ACOs under the Medicare Shared Savings Program.
• What changes: Patient assignment can be based on primary care services provided by additional ACO professionals, not just the traditional providers used for assignment today.
• When: Applies to performance years beginning on or after January 1, 2027.