As part of MassHealth’s annual Accountable Care Organization (ACO) program update process, there will be changes to ACO hospitals and providers within the managed care program effective January 1, 2027. Please reference All Provider Bulletin 422 at https://www.mass.gov/lists/2026-masshealth-provider-bulletins for more details.
For questions or concerns:
LTSS providers, please contact the LTSS Provider Service Center at (844) 368-5184 or support@masshealthltss.com.
All other providers, please contact MassHealth at (800) 841-2900 or provider@masshealthquestions.com.