MassHealth Migration to AWS & Public Meeting on 1115 Demonstration
Subject: Important Updates: 
Dear Chiropractic Community,
Please review the following important updates from MassHealth regarding the upcoming Migration of MMIS/POSC to AWS and an Annual Public Meeting on the 1115 Demonstration Program. We encourage you to attend and stay informed about these key developments.
1. MassHealth Migration of MMIS/POSC to AWS
Date: Friday, April 14 – Monday, April 17, 2025
MassHealth will be migrating its Medicaid Management Information System (MMIS) and Provider Online Service Center (POSC) to an Amazon Web Services (AWS) data center from April 14-17, 2025. This transition may impact provider access to the system.
Key Details:
- MassHealth has released All Provider Bulletin 401 – MMIS POSC Migration to AWS, outlining essential cutover information.
- Access provider bulletins here: 2025 MassHealth Provider Bulletins
- Previous updates have been shared via remittance advice banner messages, available here: February 2025 Message Text
Informational Session on Migration
MassHealth’s BSS Provider Relations team is hosting an informational session to help providers prepare. Attendance is strongly encouraged.
📅 Date: Monday, March 10, 2025
🕙 Time: 10:00 AM
🔗 Registration Link: Register Here
Topics Covered:
✅ Reasons for the Migration – Benefits of transitioning to AWS
✅ Timeline of Activities – Key steps and important dates
✅ Provider Impact – Workflow changes, potential disruptions, and mitigation steps
For questions regarding this migration:
- LTSS providers: Call (844) 368-5184 or email support@masshealthltss.com
- All other providers: Call (800) 841-2900 or email provider@masshealthquestions.com
