ACO Assignment Improvement Act of 2025
Sponsored By: Senator John Barrasso
Introduced
Summary
Expands which primary care services count when assigning Medicare beneficiaries to Accountable Care Organizations (ACOs). The bill would add primary care services furnished by ACO professionals described in 1899(h)(1)(B) to the Medicare Shared Savings Program attribution rules for performance years beginning on or after January 1, 2026.
Show full summary
- Accountable Care Organizations (ACOs): Would see a broader set of primary care activity used to link beneficiaries to an ACO. That could change which patients are attributed to an ACO starting with the 2026 performance year.
- Primary care professionals defined in 1899(h)(1)(B): Their primary care visits would count toward MSSP beneficiary assignment. Those services could influence which ACO gets credit for a patient.
- Medicare beneficiaries: Some people could be attributed to different ACOs because more types of primary care services count toward assignment. The change applies to performance years beginning January 1, 2026.
- Program administrators: The revision operates within the existing MSSP and Title XVIII framework and adjusts only the attribution basis for beneficiaries.
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Bill Overview
Analyzed Economic Effects
1 provisions identified: 1 benefits, 0 costs, 0 mixed.
Medicare ACO assignment adds primary care
If enacted, this bill would change how Medicare assigns people to Accountable Care Organizations (ACOs). It would add primary care services furnished under title XVIII (Medicare) by ACO professionals described in subsection (h)(1)(B) to the Medicare Shared Savings Program assignment rules. This would apply for MSSP performance years beginning on or after January 1, 2026. It would not create new Medicare funding or change Medicare benefits; it only changes which enrollees may be attributed to which ACOs and who helps coordinate their care.
Sponsors & CoSponsors
Sponsor
John Barrasso
WY • R
Cosponsors
Sheldon Whitehouse
RI • D
Sponsored 12/4/2025
Roll Call Votes
No roll call votes available for this bill.
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