Medicare expands ACO enrollment by adding nurse practitioners as assignment anchors

What it does

This bill expands how Medicare assigns beneficiaries to Accountable Care Organizations (ACOs) by adding nurse practitioners, physician assistants, and clinical nurse specialists as eligible primary care providers for assignment purposes, starting in 2026. Currently, assignment is based on primary care from physicians; this change broadens the pool of providers whose patient relationships can anchor an ACO assignment, potentially allowing more beneficiaries to be assigned to ACOs and giving those providers a larger role in coordinating care.

Why we flagged it

The bill's operative mechanism is a straightforward amendment to the Medicare ACO assignment rule, expanding the set of qualifying primary care providers. It is a technical regulatory change, not a financial carve-out or deregulation, and it directly addresses the stated purpose of improving assignment methodology.

What the text implies

• Expanding ACO assignment based on non-physician providers may increase the volume of beneficiaries in ACO risk-sharing arrangements without corresponding expansion of quality oversight or beneficiary protections specific to non-physician-led care coordination.
• The bill does not specify how ACO performance incentives (shared savings, quality metrics) apply when assignment is anchored to a nurse practitioner, physician assistant, or clinical nurse specialist rather than a physician, creating potential ambiguity in accountability.

The full analysis lists 4 implications of this text.

Who stands to gain

Accountable Care Organizations (ACOs); Nurse practitioners, physician assistants, and clinical nurse specialists (as expanded assignment an; Healthcare systems and practices employing non-physician providers