As part of MassHealth’s annual Accountable Care Organization (ACO) program update process, there will be changes to ACO service areas, hospitals, providers, and health plans within the managed care program effective January 1, 2026. Please reference All Provider Bulletin 410 at https://www.mass.gov/lists/2025-masshealth-provider-bulletins for more details.
For questions or concerns:
LTTS providers, please contact the LTSS Provider Service Center at (844) 368-5184 or support@masshealthltss.com.
All other providers, please contract MassHealth at (800) 841-2900 or provider@masshealthquestions.com.
Changes to MassHealth’s Accountable Care Organizations on January 1, 2026