MedicaidAdministrativeMedium impact
AHCCCS Medicaid Enterprise System (MES) Modernization Program Timeline
Arizona Medicaid - AHCCCS·AZ·Provider News
Effective date
Jan 15, 2026
We identified it
Jun 17, 2026
Summary
AHCCCS is modernizing their Medicaid Enterprise System with four key projects: Electronic Data Interchange (EDI), Program Integrity fraud detection, Customer Service System, and Mainframe Database migration to cloud. EDI testing with external partners begins January 15, 2026, and mainframe testing starts Fall 2026.
Action Required
By January 15, 2026: If selected as an EDI testing partner, billing team must participate in AHCCCS testing of new Electronic Data Interchange system for secure data exchange. Monitor communications from AHCCCS for selection notification and testing requirements. By Fall 2026: If selected for mainframe testing, participate in Azure cloud environment testing with AHCCCS staff.