MedicaidAdministrativeMedium impact
Managed Care Entity Bulletin 126: Accountable Care Organizations—Primary Care Provider Additions and Removals Effective January 1, 2026
MassHealth·MA · Family Medicine, Internal Medicine, General Practice +1 more·Managed Care
Effective date
Jan 1, 2026
We identified it
Jun 18, 2026
Summary
MassHealth has issued new requirements for Accountable Care Organizations (ACOs) to propose adding or removing primary care providers, with proposals due by May 30, 2025, and changes effective January 1, 2026. ACOs must follow specific submission processes and provide 90-day continuity of care periods for newly enrolled members.
Action Required
By May 30, 2025: If your practice is part of an ACPP or PCACO and wants to join/leave an ACO network, work with your ACO to submit required forms to MassHealth. Contact your ACO's MassHealth contract manager for submission requirements. Beginning January 1, 2026: Provide 90-day continuity of care for new ACO members, including payment to out-of-network providers during transition and special attention to pregnant patients, complex medical conditions, and behavioral health services.