Policy Snapshot
July 27, 2026
To participate in an Accountable Care Organization (ACO) for performance year 2027, work with an ACO to join its participant list. ACOs must submit their lists to CMS by August 5, 2026, by:
- 12:00 PM ET for the Medicare Shared Savings Program
- 11:59 PM ET for the Long-Term Enhanced ACO Design (LEAD) Model
Your taxpayer identification numbers can’t overlap multiple ACO participant lists. Resolve any overlaps by September 8, 2026.
More information:
- Application Types & Timeline webpage
- Email questions to SharedSavingsProgram@cms.hhs.gov or LEAD@cms.hhs.gov