MedicaidAdministrativeHigh impact
Urgent: Provider Recredentialing Mississippi Medicaid Managed Care Programs
Mississippi Medicaid (DOM)·MS·Prior Authorization
Effective date
Jul 1, 2024
We identified it
Jun 21, 2026
Summary
Mississippi Medicaid is transitioning to a single Pharmacy Benefit Administrator (Gainwell Technologies) on July 1, 2024, requiring all pharmacy providers to update billing systems with new BIN/PCN values and all prescribing providers to submit prior authorizations through the MESA Portal or fax to Gainwell.
Action Required
By July 1, 2024: Pharmacy providers must update billing software to use BIN 025151 and PCN DRMSPROD for all Mississippi Medicaid claims with service dates 7/1/2024 and after. Prescribing providers must switch all pharmacy prior authorization submissions to MESA Portal or fax 866-644-6147. Update contact information to use new pharmacy help desk at 833-660-2402. For retroactive claims before 7/1/2024, continue using previous CCO PBM billing methods.