MassHealth will begin migrating its Medicaid Management Information System (MMIS) and Provider Online Service Center (POSC) to Amazon Web Services (AWS) the weekend of March 14, 2025. MassHealth has published All Provider Bulletin 401: MMIS POSC Migration to Amazon Web Services, which outlines key cutover information, related shut down of functionality, and a list of activities that will take place leading up to and through cutover. Providers, Vendors, and Trading Partners are strongly encouraged to review the bulletin for additional details including new URL, IP Addresses, and other technical information to ensure your organization is ready for the cutover and the transition is smooth.
All published bulletins can be found on Mass.gov: https://www.mass.gov/lists/400-through-300 and https://www.mass.gov/lists/provider-bulletins-by-year.
Please note that MMIS and the POSC will not be available for use from Friday, March 14 at 12:00 pm through Monday, March 17 at 7:00 am. MassHealth’s migration to AWS will NOT affect the look and functionality of the MMIS or POSC application.
REMINDER: MassHealth will process the financial cycle on Wednesday, March 12 instead of Friday, March 14 so providers should plan accordingly. Providers who normally submit their claims on Thursday or Friday should submit them on Wednesday, March 12 by 3:00 pm instead to be included in the financial cycle for that week. Claims submitted after the financial cycle is run will be included post AWS cutover.
REMINDER: It’s important that services delivered to MassHealth members over the cutover weekend are not disrupted. Please ensure that you continue to provide services to MassHealth members that present a valid MassHealth ID card. If you intend to provide scheduled services over the cutover weekend, please ensure that you validate the MassHealth member’s eligibility on Friday, March 14 before the POSC shuts down at 12:00 pm and again on Monday, March 17 after 7:00 am. Please note, providers may contact MassHealth Customer Service up until 6:00 pm on Friday, March 14 to validate eligibility verification as necessary.
If you have questions regarding this message, please contact MassHealth:
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.