MedicaidAdministrativeHigh impact
Provider Maintenance Operations (Licensure Review)
Mississippi Medicaid (DOM)·MS·Enrollment
Effective date
Oct 3, 2022
We identified it
Jun 21, 2026
Summary
Mississippi Medicaid has transitioned to a new provider portal system called MESA (Medicaid Enterprise System Assistance) for all claims submission, prior authorization requests, and member eligibility verification. All Mississippi Medicaid and CHIP providers must register and use this new portal system for all billing operations.
Action Required
Immediately: All Mississippi providers must register for the new MESA portal system to submit claims, access remittance advice, submit prior authorization requests, and verify member eligibility. Billing team must complete portal registration and training using the provided documentation and video guides. Failure to register will prevent claims submission and payment processing for Mississippi Medicaid and CHIP patients.